—Mary was heard ________ just now. What happened?—John was telling a joke.
There ______ a number of students in our school. The number of the students ______ more than 7000.
You must be very tired. Why not ______ a rest.
The story was _______ interesting _______ everyone would listen to it.
--- What __________ him? --- He had a cold last night.
Which do you ________, cola or juice ?