Question

The teacher_____have thought Johnson was worth it or she wouldn’t have wasted time on him,I suppose

1. A.
   should
2. B.
   can
3. C.
   would
4. D.
   must

Answer 1

D
“must have +動詞+ed形式”表示“一定做了某事”。根據(jù)所提供的情景or she wouldn’t have wasted time on him可判斷出老師一定認為Johnson值得教，要不她不會在他身上浪費那么多時間�！皊hould have +動詞+ed形式”表示“本來應(yīng)該做某事，而沒有做”，常用于表示責(zé)備�！癱an have +動詞+ed形式”表示“可能做了某事”。would用于表示虛擬、假設(shè)、條件等，有“要、將要、會、就會”等意思。