They have been living here since 20 years up to present

Câu hỏi :

Choose the option among A, B, C, D whIch needs correcting to make a complete sentence
They have been living here since 20 years up to present

A. have been

B. here

C. since

D. up to present

* Đáp án

* Hướng dẫn giải

Đáp án là C. since => for. Vì 20 years là khoảng thời gian.

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