It is usually warm in my hometown in March, but it ______ be rather cold sometimes.
Mis Smith is a friens of ___.
--Has the train arrived yet?---No, it ought to ___ twenty minutes ago.
I didn't expect that so many people ___ to join in the work.
Mr.Brown ___ goes to bed before midnight.
Mr. Green always goes to ___ cinema on Sunday afternoon, while his wife goes to ___ church on Sunday morning.