-----I didin't give him a hand when he was in trouble.
-----A.should B.ought to haveC.ought to doD.should do
为什么选B
参考答案:outht to have done sth.表示“本该做某事(却未做)”,符合题意。
-----A.should B.ought to haveC.ought to doD.should do
为什么选B
参考答案:outht to have done sth.表示“本该做某事(却未做)”,符合题意。