Would it be ___ for you to pick me up at four o’clock and take me to the airport?
My son prefers us to email each other once a week __________ spend half an hour on the phone every night.
The suggestion that is worth __________ is that the students should learn something practical.
—Hi, which university do you prefer? —Well, I've been considering __________ to Harvard University.
She had just finished her homework __________ her mother asked her to practice __________ the piano yesterday.
The squirrel was lucky that it just missed __________.