21．Let’s go to _____ cinema, that will take your mind off the problem for ____ while.
A. the ; the B. the ; a C. a ; the D. a; a
22．The sports meet will be ______ till next week because of the bad weather.
A. put off B. put away C. put up D. put forward
23．Trees on the hills can stop the rains from away the soil.
A．washes B．washed C．to wash D．washing
