１.I have kept the books for 3 weeks.I___them to the library last week.a.ought to have returnedb.ought to return ould returnd.ought have returned 我选的是C，正确答案是A．为什么？2.It'll make me ___if you'll accept it. happily happy ch happiness ch happily 正确答案是Ｂ．为什么？
热心网友
1 虚拟语气 意思是我本来应该上个星期还的 ２make sb happy 固定搭配