16.It is characteristic of the Metropolitan Museum of Art, as of virtually every great American museum the taste of local collectors has played at least as large a part in the formation of their collections as has the judgments of the art historian.

A.of virtually every great American museum, the taste of local collectors has played at least as large a part in the formation of their collections as has

B.of virtually every great American museum, that the taste of local collectors has played at least as large a part in the formation of their collections as has

C.It is of virtually every great American museum, that the taste of local collectors has played at least as large a part in the formation of their collections as have

D.it is of virtually every great American museum, the taste of local collectors have played at least as large a part in the formation of their collections as have

E.It is of virtually every great American museum, the taste of local collectors has played at least as large a part in the formation of their collections as has

答案选C，我选B，为什么It is 不能省略，使OF。。。作为省略句呀？还有最后一个词为什么是HAVE？主语是什么？

17。There has been a 30-to 40-fold increase in the incidence of malaria caused by increasing mosquito resistance against pesticides.

A.increase in the incidence of malaria caused by increasing mosquito resistance against

B.increase in the incidence of malaria because of increasing resistance of mosquitoes to

C.increaseing malaria incidence because of increasing resistance of mosquitoes to

D.incidence of malaria increase caused by increasing mosquito resistance against

E.incidence of malaria increase because of increased mosquito resistance to

答案选B，我选A

1 For 16, have 的执行主语是 the judgments.所以用 have, 不能用 has.

For 17,主要有两个错误.一,caused by的修饰对象.在语法上caused by是修饰

malaria,但在句子逻辑意思上它应该是修饰increase.所以造成修饰对象的错误

. 二,搭配错误.resistance to 而不是不是resistance against.

答案B很好的解决了上述的两个问题.