32. ---Why on earth didn’t you answer the phone? ---I’m sorry but the doorbell too.A. is

问题补充：

32. ---Why on earth didn’t you answer the phone?

---I’m sorry, but the doorbell too.

A. is ringing

B. was ringing

C. rang

D. was about to ring

答案：

A. is ringing

(答案→)B. was ringing

C. rang

D. was about to ring

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