Bob promises to join in the football match ______ he has to help his parents on the farm.
─I want to know if your daughter will go to the teenager party. ─If your daughter does, so________.
There are many people downstairs. What do you think _____?
Each of us has to write a ______ report every two weeks.
Tens years ago, there _____ full of fish in the lake .Now there are _____ fish .
The doctor did what he could _____the dying man.