18．The light is still on. The student to switch it off. A. must forget B. must——青夏教育精英家教网——

摘要：18．The light is still on. The student to switch it off. A. must forget B. must have forgotten C. might forget D. may forget

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“The light is still on.” The student ________ to switch it off.

A. must forget

B. must have forgotten

C. might forget

D. may forget

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“The light is still on.” The student ________ to switch it off.

A. must forget

B. must have forgotten

C. might forget

D. may forget

查看习题详情和答案>>