-- Perhaps Tom's not in.-- . Look the light's on.A. Yes he can be at homeB. No he mustn

问题补充：

-- Perhaps Toms not in.

-- . Look, the lights on.

A. Yes, he can be at home

B. No, he mustn go out

C. Yes, he must be at home

D. No, he needn go out

答案：

A. Yes, he can be at home

B. No, he mustn go out

(答案→)C. Yes, he must be at home

D. No, he needn go out

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