2. 外语
  3. Clearly, if we ______ in the class we must communicate with our classmates.

Clearly, if we ______ in the class we must communicate with our classmates.

admin2010-03-19  8
问题 Clearly, if we ______ in the class we must communicate with our classmates.
选项 A、participate
B、are to participate
C、will participate
D、do participate
答案B
解析 本句是动词不定式放在be动词后面作表语，表示1)计划要做的事；2)有义务要做的事；3) (在条件句中指)预期要达到的目标；4)(如果是用be动词的过去式was/were to do)证明了事情发展的结果；5)(有时，用be动词的过去式was/were to do)表示投有可能的事情，或者没有做成功。请参照第三套试题的43题题解。
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