1)Either you or I _____going to the supermaket tomorrow.
问题描述：
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,
答
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……
希望能对你有所帮助