—Did you notice John was not at work today?

—No.If _______ working,I would have noticed it.

A. I’d B. I was

C. I’d been D. I were?

 – Did you notice John was not at work today?

--- No. If _____working, I would have noticed it.

A. I’d be    B. I wasn’t     C. I’d been     D. I weren’t

－Did you notice John was not at work today?

－No, if ________ working, I would have noticed it.

[　　]

从所给的四个选项中选择最佳答案

—Did you notice John was not at work today?

—No. If ______ working, I would have noticed it.

[　　]

A．I'd be　　　B．I wasn't　　　C．I'd been　　　D．I weren't