问题

With temperature ________ so rapidly,we could not go with the experiment.[ ]
A: fall
B: falling
C: fallen
D: to fall
B: falling
C: fallen
D: to fall
正确答案是:
同类题型
She usually ______ hard at school when she was a student.
What fun it is to walk alone with full moon hanging in the sky.
Though you have failed many times, you shouldn’t ______. [ ]
Many great men rose from poverty, Lincoln and Edison ____
We had to ____our discussion because one of us suddenly got ill.