The teacher have thought Johnson was worth it or she wouldn’t have wasted time o
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The teacher __________ have thought Johnson was worth it or she wouldn’t have wasted time on him, I suppose.
A. should B. canC. would D. must
试题答案
D。
解析:
“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。