Choose the correct answer.
1. Fortunately, the hospital's new air-conditioning system________ when the first heat wave of the summer arrived.
2. My close friend is often concerned _______ all problems that I mention.
3. The exam is coming, so the teachers tell their students _______ a lot.
4. The plane _______ by the time I arrived at the airport. I missed the flight.
5. The number of injuries from automobile accidents _______ every year.
6. What a pity! Mary isn't here now. If she ___ here now, she ___ what to do.
7. When I ______ to the cinema last night, the film ______ a quarter before.
8. He spent almost his time ________ his favourite subjects.
9. If you only care about your interests and feelings, you are very ...........................
10. Does Dr. Johnson mind -----------at home if his patients need his help?
