Question

. The teacher __________ have thought Johnson was worth it or she wouldn’t have wasted time on ..

. The teacher __________ have thought Johnson was worth it or she wouldn’t have wasted time on him, I suppose. A．should B．can C．would D．must

Answer 1

D。

“must+have+过去分词”表示对过去情况的肯定推测。句意为：我想，老师一定认为约翰逊是值得教的，要不然她就不会在他身上浪费时间了。