问题
选择题
—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
答案：D
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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