GWD31-6-2、GWD31-6-14、GWD31-6-27、GWD31-6-41抓狂中，求高人搭救

Q2:

For protection from the summer sun, the Mojave lived in open-sided, flat-topped dwellings known as shades, each a roof of poles and arrowweed supported by posts set in a rectangle.

1. each a roof of poles and arrowweed
2. each a roof of poles and arrowweed that are being
3. with each being a roof of poles and arrowweed
4. with roofs of poles and arrowweed to be
5. with roofs of poles and arrowweed that are

 Answer: A

题干不太懂，尤其是each a roof of poles以及arrowweed supported，谁能解释一下呀

1. is expected to make an offer to buy First Interstate Bank until a merger agreement is signed that includes a provision for penalties if the deal were
2. is expected to make an offer for buying First Interstate Bank until they sign a merger agreement including a provision for penalties if the deal was
3. is expected to make an offer to buy First Interstate Bank until a merger agreement be signed by them with a provision for penalties if the deal were
4. are expected to make an offer for buying First Interstate Bank until it signs a merger agreement with a provision for penalties included if the deal was
5. are expected to be making an offer to buy First Interstate Bank until they sign a merger agreement including a provision for penalties if the deal were

  Answer: A

我选C，A中that不是应该紧跟被修饰成分的吗？

1. number of wild salmon have been reduced because of uncontrolled deep-sea and coastal netting
2. number of wild salmon is reduced because deep-sea and coastal netting is not controlled
3. numbers of wild salmon has been reduced because of uncontrolled deep-sea and coastal netting
4. wild salmon’s numbers are reduced by deep-sea and coastal netting that is not controlled
5. wild salmon’s numbers have been reduced by uncontrolled deep-sea and coastal netting

Answer: E

我选A，不是A+介词+B的结构要优于B+A的结构吗，而且这里为什么要用numbers？

1. when it is known that humans made
2. at which it is known that humans had made
3. at which humans are known to have made
4. that humans are known to be making
5. of humans who were known to make

Answer:A

我以前做在其他地方做这道题答案似乎选E ，迷茫啊，到底哪个对啊？

Q2:
For protection from the summer sun, the Mojave lived in open-sided, flat-topped dwellings known as shades, each a roof of poles and arrowweed supported by posts set in a rectangle.
            

1. each a roof of poles and arrowweed
2. each a roof of poles and arrowweed that are being
3. with each being a roof of poles and arrowweed
4. with roofs of poles and arrowweed to be
5. with roofs of poles and arrowweed that are

 Answer: A

我的理解是 a roof (of  poles and arrowweed） supported by... poles and arrowweed是roof的建筑材料，roof is supported by posts.  set in a rectangle是修饰posts. A 选项是最简洁的。 E 中的that 从句容易误解成修饰arrowweed.

D 中不定式理解为表目的或是表将来都理解不通。

Q14:Not one of the potential investors is
expected to make an offer to buy First Interstate Bank until a merger
agreement is signed that includes a provision for penalties if the deal
were not to be concluded.
                    

1. is
   expected to make an offer to buy First Interstate Bank until a merger
   agreement is signed that includes a provision for penalties if the deal
   were
2. is
   expected to make an offer for buying First Interstate Bank until they
   sign a merger agreement including a provision for penalties if the deal
   was
3. is
   expected to make an offer to buy First Interstate Bank until a merger
   agreement be signed by them with a provision for penalties if the deal
   were
4. are
   expected to make an offer for buying First Interstate Bank until it
   signs a merger agreement with a provision for penalties included if the
   deal was
5. are
   expected to be making an offer to buy First Interstate Bank until they
   sign a merger agreement including a provision for penalties if the deal
   were

  Answer: A

 C中的them 指代不明确。而且until引导的状语从句中用be 是没有根据的。A中的that 从句置后这种情况在不少的考题中出现过。虽然不是很规范，但是A是相对最优的选项。

Q27:

In Scotland, the number of wild salmon have been reduced because of uncontrolled deep-sea and costal netting, by pollution, and by various other threats to the fish’s habitat.

1. number of wild salmon have been reduced because of uncontrolled deep-sea and coastal netting
2. number of wild salmon is reduced because deep-sea and coastal netting is not controlled
3. numbers of wild salmon has been reduced because of uncontrolled deep-sea and coastal netting
4. wild salmon’s numbers are reduced by deep-sea and coastal netting that is not controlled
5. wild salmon’s numbers have been reduced by uncontrolled deep-sea and coastal netting

Answer: E

A中the number of ... have 主谓不一致，应用has.

Q41:Scientists
have dated sharp-edged flakes of stone found in the fine-grained
sediments of a dry riverbed in the Afar region of Ethiopia to between
2.52 and 2.60 million years ago, pushing back by more than 150,000
years the earliest date when it is known that humans made stone tools.
                                                

1. when it is known that humans made
2. at which it is known that humans had made
3. at which humans are known to have made
4. that humans are known to be making
5. of humans who were known to make

Answer:A

这道题我也差点选了E, 但是还是觉得是A. the earliest date 是指人类开始制造工具的时间，而不是the earliest date of humans... E 选项改变了句意。

谢谢老大！