题目

1)Either you or I _____going to the supermaket tomorrow.
A:are B:am C:were D:finished
2)Upon_____his homework,he started playing games with his friends
A:finishing B:finished C:finishes D:finished
3)It,s necessary _____us to go over what we have learned
A:to B:with C:of D:for
（请解释选择的原因,

提问时间：2021-04-01

答案

1,am 这个句子的动词使用就近原则,靠近的是I,所以用am
2,finishing upon是介词,介词后面的动词要用动名词形式
3,for it is+形容词+for sb to do sth.这是固定搭配,做某事对于某人来说很……
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