题目内容
—How wonderfully Jim is swimming in the pool！
—It ______ be Jim. I am not sure.
| A．needn't | B．mustn't | C．may not | D．can't |
D
解析试题分析：句意：--吉姆在游泳池中游得多么精彩啊！--它不可能是吉姆。我不确定。分析：考查表示否定的猜测时用can’t.故选D
考点：考查情态动词的用法。
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