—Must I go through the radiation (辐射) check when I come back from Japan at the airpo

—Must I go through the radiation (辐射) check when I come back from Japan at the airport these days?
—Yes, you ______.

A．can

B．may

C．might

D．must

答案

D解析:
情态动词。情态动词must意为“必要”时，引导的问句的肯定回答用must。

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—Must I go through the radiation (辐射) check when I come back from Japan at the airpo

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