问题

Let’s_____planting the trees until tomorrow. I think it’s going to rain.
A:when
B:while
C:before
D:after;
B:while
C:before
D:after;
正确答案是:
同类题型
The factory used 65 percent of the raw materials, the rest of which _____ saved for other purposes
At last, the girl was made _______ and began to do her homework.
It is not easy to learn English well but if you ______, you will succeed in the end.
Tomorrow is Saturday. Don’t ______ early! He wants tosleep more.