—Must I go through the radiation (辐射) check when I e back from Japan at the airport these days?
—Yes, you .
A. can
B. may
C. might
D. must
网友回答
A. can
B. may
C. might
(答案→)D. must
解析：本题考查情态动词。情态动词must意为“必要”时，引导的问句的肯定回答用must。 句意：——这些日子当我从日本回来，我必须做辐射检查吗？——是的，你必须。