He had to pause from time to time to wipe the sweat from his forehead, because the air—conditioning system ______________.
Sometimes proper answers are not far to seek ______ food safety problems.
To get a better grade, you should ______ the notes again before the test.
I ______ through that bitter period without your generous help.
Even the best writers sometimes find themselves _____ for words.
The island, _____ to the mainland by a bridge, is easy to go to.