The word 'it” in paragraph 3rd refers to ____________. 

Câu hỏi :

The word “it” in paragraph 3 refers to ____________. 

A. feature

B. glass

C. manner

D. viscosity

* Đáp án

B

* Hướng dẫn giải

Đáp án B 

“Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid.” 

Do đó: its viscosity = viscosity of glass

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