Bob would have helped us yesterday, but

考试题库2022-08-02 49

问题 Bob would have helped us yesterday, but he ____.A． was busy B． is busy C． had been busy D． will be busy

选项 A． was busy
B． is busy
C． had been busy
D． will be busy

答案 A

解析本题考查时态。句意：Bob昨天本要帮助我们的，但是他太忙了。前句表示对过去的虚拟，而but之后表示过去的客观事实，故用一般过去时态。

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