Many countries are increasing their use of natural gas, wind and other forms of ______.
A. energy B. power C. force D. strength
It may not be a great suggestion. But before ______ is put forward, we will make do with it..
A. a best one B. the best one C. a better one D. a good one
Try not to cough more than you can ______ since it may cause problems to your lungs.
A. help B. stop C. allow D. check
He was unhappy when he sold his guitar. After all, he ______ it for a long time..
A. had had B. has had C. has D. had
Animals are obviously ______ lower form of life than ______ man.
A. the;the B.a;/ C. a;the D. /;/
Experts believe ______ people can waste less food by shopping only when it is necessary.
A. why B. what C. where D. that
