Mary didn’t mention ___ about her progress report at work, but I’m sure she is.

Câu hỏi :

Mary didn’t mention ___ about her progress report at work, but I’m sure she is.

A concerning

B to concern

C being concerned

D to be concerned

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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