. —I cannot find Tom anywhere. —He _________ have been off long. I heard him make a call just now.
A、shouldn't
B、can't
C、mustn't
D、needn't
【正确答案】：B
【题目解析】：【答案】B 【译文】“我在哪儿都找不到汤姆。”“他一定没走多远，我刚才还听见他打电话了呢”。 【考点】考查情态动词与虚拟语气用法 【解析】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。
