Question

【题目】You ______ walk to close to the edge of the hill because you might fall and hurt yourselves.
A.mustn't
B.must
C.can
D.needn't

Answer 1

【答案】A
【解析】句意：你不得靠近山边走，因为你可能摔倒受伤。A. mustn't不准，禁止；B. must必须，强调主观愿望；C. can能，会，指能力；D. needn't不必。为了安全，禁止在山边走动。故选A。