[求助]90-08-2&90-10-31/39

90-08-2. Because its leaves remain green long after being picked, rosemary --- associated with the idea of remembrance.
(A) and becomes
(B) became
(C) becoming
(D) to become

用排除法很方便就把（B）选出来，可是这里的became和remain有时态上的冲突，怎解？是不是说rosemary的叶子在摘下后长时间仍保持绿色是一个客观事实所以用一般现在时？

这道题肯定不选B.如果选B的话became和associated怎么能连用呢？

而且这道题也不是90年8月的题

个人感觉选C吧

个人还是不太懂得。只是觉得C动名词还可以。高人指点

90-10-31.  For centuries waterwheels were the only sourcesof power aside from human and animal   strong .

答案选（D），可我觉得（B）的这里的the only sources 用复数有问题～

没问题吧。
▶MONEY/PROPERTY ETC◀
resources[plural]all the money, property, skills etc that you have available to use when you need them

90-08-08. Because its leaves remain green long after being picked, rosemary --- associated with the idea of remembrance.
(A) and becomes
(B) became
(C) becoming
(D) to become

用排除法很方便就把（B）选出来，可是这里的became和remain有时态上的冲突，怎解？是不是说rosemary的叶子在摘下后长时间仍保持绿色是一个客观事实所以用一般现在时？

肯定选B.   认为时态不对.  应该一致.

90-10-31.  For centuries waterwheels were the only sourcesof power aside from human and animal   strong .

答案选（D），可我觉得（B）的这里的the only sources 用复数有问题～

没有问题.  the only +复数, 表示唯一的一批东东. 比如the first + As  一样的.