问题 选择题

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

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。

多项选择题
单项选择题 A1/A2型题