21. The hunter gave a ________ at the bush, but the rabbit was nowhere ___________.
A. glance; to see B. sight; to be seen C. glance; to be seen D. sight; to see
22. Imposing(施加) speed restrictions is easy, but forcing drivers to ________ them is difficult.
A. grasp B. analyse C. replace D. observe
23. It’s said that the liquid will change in volume once _________ in this _________ weather.
A. freezing; frozen B. frozen; freezing
C. being frozen; frozen D. it freezes; freezing
24. The food here doesn’t ________ my taste. This restaurant wasn’t ________ that other one we went to.
A. match; as half good as B. suit; half as good as
C. fit; good as half as D. agree; half good as
