We called ____ ambulance as soon as we realized that my grandfather seemed to be having _____ heart attack.

Câu hỏi :

We called ____ ambulance as soon as we realized that my grandfather seemed to be having _____ heart attack.

A the – some        

B some - Φ

C Φ – the  

D an – a

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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