A lot __to save the old man's lifeA have been done B has been don_英语解答

A lot __to save the old man's life
A have been done B has been done

人气：398 ℃　时间：2019-12-01 13:18:07

解答

B
a lot可以跟可数名词复数,也用跟不可数名词,象这种单用作主语的"很多"本身是不可数名词,所以后面用谓语单数