When I went in, the old man was sitting in an armchair _____ out of the window

Câu hỏi :

When I went in, the old man was sitting in an armchair _____ out of the window

A stare

B staring

C stared

D was staring

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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