My parents live in a small village. They always keep candles in the house ____ there is a power cut.
A. if B. unless C. in case D. so that
--- An ant has two stomachs --- one for itself, one for others.
--- Really? Quite interesting. I ____ anything about it.
A. don’t know B. have known C. haven’t known D. didn’t know
I’m sorry, sir, I _____ the work last Monday, but I was too busy.
A. ought to B. should finish C. must have finished D. was to have finished
Water can absorb and give off a lot of heat without big changes in temperature, thus creating a _________ environment.
A. peaceful B. sensitive C. common D. stable
Seeing the happy _____ of children playing in the park, I’m full of joy and confidence in the future of our country.
A. sight B. scene C. view D. sign
--- I’m worried about the coming test and I’m afraid I can’t pass it.
--- __________! I’m sure you’ll make it.
A. Go ahead B. Good luck C. No problem D. Cheer up
