2. 外语
  3. He’s watching TV? He’s_____to be cleaning his room.

He’s watching TV? He’s_____to be cleaning his room.

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问题 He’s watching TV? He’s_____to be cleaning his room.
选项 A、known
B、supposed
C、regarded
D、considered
答案B
解析 “be supposed to do sth．”构成一固定用法，意为“should do sth．”。
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