Only then ______ how much damage had been caused.
A. she realized B. she had realized
C. had she realized D. did she realize
It was not _____she took off her glasses_____I realized she was my old friend.
A. when, that B. until , that
C. until , when D. when, then
Use the umbrella to ______ yourself from the rain.
A. prevent B. keep C. save D. protect
______ for a long time, but he managed to catch up with his classmates at last.
A. Having been ill B. Being ill C. He was ill D. Though ill
--Excuse me, what time is it now?
--Sorry, my watch ___. It __ at the shop.
A. isn't working; is being repaired
B. doesn't work; is being repaired
C. isn't working; is repaired
D. doesn't work; is repaired
Great measures ______ to prevent the air pollution, but the sky is still not clear.
A. is taken B. are taken
C. has been taken D. have been taken
