Last week, our class went to Ha Long Bay for a picnic, ________ made us very happy then.

Câu hỏi :

Last week, our class went to Ha Long Bay for a picnic, ________ made us very happy then.

A which

B that

C it

D of which

* Đáp án

A

* Hướng dẫn giải

Phương pháp giải:

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