GWD-2-3,13,33

Q3:
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.

A. 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
B. 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
C. 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
D. 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
E. 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: C
选项里面为什么用be，省略了什么啊？deal是前面的什么啊，为什么用复数的形式？

Q13:
Plants are more efficient at acquiring carbon than are fungi, in the form of carbon dioxide, and converting it to energy-rich sugars.

A. lants are more efficient at acquiring carbon than are fungi
B. lants are more efficient at acquiring carbon than fungi
C. lants are more efficient than fungi at acquiring carbon
D. lants, more efficient than fungi at acquiring carbon
E. lants acquire carbon more efficiently than fungi
   Answer: C
为什么B不对?

Q33:
When an active tooth in the shark’s jaws is lost or worn down, many spare teeth lie in seemingly limitless reserve, each of which are ready to slide into the appropriate position.

A. When an active tooth in the shark’s jaws is lost or worn down, many spare teeth lie in seemingly limitless reserve, each of which are ready to slide into the appropriate position.
B. Whenever an active tooth is lost or worn down, many spare teeth lie in seemingly limitless reserve in the shark’s jaws, which are each ready to slide into the appropriate position.
C. Many spare teeth lie in seemingly limitless reserve in the shark’s jaws, each one of which are ready to slide into the appropriate position when an active tooth is lost or worn down.
D. The many spare teeth lying in seemingly limitless reserve in the shark’s jaws, each one of which is ready to slide into the appropriate position whenever an active tooth is lost or worn down.
E. In the shark’s jaws, many spare teeth lie in seemingly limitless reserve, each one ready to slide into the appropriate position whenever an active tooth is lost or worn down.
   Answer: A
为什么用are？

NN们教教我啊

同问~

13， 看一下没划线的部分，in the form of carborn dioxide, 近一步解释了获得carborn的形式；and coverting与acquiring并列平行。B满足不了，不知道解释的对不？

3.a merger agreement(should) be signed by them with a provision for penalties if the deal were not to be concluded这句话是虚拟语气

33.each of 独立主格which 指代teeth