When did you go to bed last night—______________

____ mountains surrounding our village are turning much greener, they have become ________ home to a large number of wild animals.

It ______ heavily when he got back home forhe was wet all over．

It has rained for a day. What timelyrain! _____________.

The factory used 65 percent of the raw materials, the rest of which _____ saved for the other purpose.