问题描述：
1.The man has ___ lonely since his wife left .A been B got C become D turned
2.Thr light is off.Mr wang _____be in the office,
A must B mustn't C can D can't
3.____ a pleasant life we are having in the century .
A what B what a C how D how a
请帮我讲解一下.
2.Thr light is off.Mr wang _____be in the office,
A must B mustn't C can D can't
3.____ a pleasant life we are having in the century .
A what B what a C how D how a
请帮我讲解一下.
问题解答：
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