1.All of the plants now raised on farms have been developed from plans_______wild.A.that once grew B.once they grew C.they grew once D.once grew选 A没看懂是啥意思2.If only she _______at that time that the disease was curable.A.knew B.knows C.

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1.All of the plants now raised on farms have been developed from plans_______wild.A.that once grew B.once they grew C.they grew once D.once grew选 A没看懂是啥意思2.If only she _______at that time that the disease was curable.A.knew B.knows C.
1.All of the plants now raised on farms have been developed from plans_______wild.
A.that once grew B.once they grew C.they grew once D.once grew
选 A
没看懂是啥意思
2.If only she _______at that time that the disease was curable.
A.knew B.knows C.has known D.had known
选D
是虚拟语气吗?
3.The students expected there________more reviewing classes before the final test.
A.is B.being C.have D.to be
选D
为什么用不定式

1.All of the plants now raised on farms have been developed from plans_______wild.A.that once grew B.once they grew C.they grew once D.once grew选 A没看懂是啥意思2.If only she _______at that time that the disease was curable.A.knew B.knows C.
第一题.你少打了个t吧.
1.All of the plants now raised on farms have been developed from plans（应该是plants吧）_______wild
那就是一个定语从句了,只能选a啊
第二题是虚拟语气,因为后面出现了was,所以前面虚拟要用过去完成时
第三题.考的是there be的句型,there be的句型,虽然后面的是主语,但形式上的主语应该是there
因为有expect sb/sth to do 的句型所以用to be

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