21．My cousin went to Canada two yours ago．He——there for a few months and then went to America．
A．worked B．would work C．would be working D.has been working
22．——I'm dead tired．I can't walk any farther，Jenny.
—— ，Tommy．You can do it!
A．No problem B．No hurry C．Come on D．That's OK
23．After the earthquake，the injured were cared——in the hospitals or taken by air to the hospitals in the
neighbouring cities.
A.of B．for c.after D.with
24．The weather turned out to be fine yesterday．I——the trouble to carry my umbrella with me．
A．should have taken B．could have taken C．needn't have taken D，mustn't have taken
