Question

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

1. A.
   can
2. B.
   may
3. C.
   might
4. D.
   must

Answer 1

D
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。