When he fell off the bike,he tried ____ but couldn't .

问题描述:

When he fell off the bike,he tried ____ but couldn't .
A.to have stood up B.standing up C.to stand up D.having stood up

答案C fall off the bike意为:从自行车上跌下来,try to do sth.意为:尽力做某事.查看原帖>>