It rained a lot during their journey, so they ________ have had a good time.
I will stay at home to play chess on the computer _____ it snows tomorrow.
The wounded ____ as well stay at home on such a terrible day.
______ in the novel, I didn’t notice what was happening.
I am sorry that I can not meet you at the railway station. I _______ Beijing by the time you come back from abroad.
The thief looked around every now and then _____ he knew he was being followed.