800 câu trắc nghiệm Điền từ Tiếng Anh có đáp án - Phần 19

It works like a greenhouse, that’s why we call (3)______ the Green House effect. Because of this effect, the Earth is getting warmer all the time.

8/35

It works like a greenhouse, that’s why we call (3)______ the Green House effect. Because of this effect, the Earth is getting warmer all the time.

is

be

it

them

Giải thích

C là đáp án đúng