2. 专升本
  3. —I cannot find Tom anywhere. — He _____ have been off long. I heard him make a call just now.

—I cannot find Tom anywhere. — He _____ have been off long. I heard him make a call just now.

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问题 —I cannot find Tom anywhere. — He _____ have been off long. I heard him make a call just now.
选项 A、shouldn’t
B、can’t
C、mustn’t
D、needn’t
答案B
解析 句意：——我在哪儿都找不到汤姆。一一他一定没走多远，我刚才还听见他打电话了呢，本题考查情态动词与虚拟语气的用法。语境表示语气很肯定的否定判断推测：我刚才还听见他打电话了，因此他一定没走多远。用can’t have done。shouldn’t have done表示本不应该做某事；mustn’t have done表示禁止做某事；而needn’t have done指的是本来没必要做某事。
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