The hourglass, an instrument used _______, usually consists of two bulbs united by a narrow neck

Câu hỏi :

The hourglass, an instrument used _______, usually consists of two bulbs united by a narrow neck.

A. measures time 

B. time is measured   

C. for measuring time     

D. the time for measuring

* Đáp án

C

* Hướng dẫn giải

Đáp án C

Use for doing sth: Sử dụng để làm gì

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