Choose the sentence that best combines each pair of sentences given. I never turn on the TV when leaving a room. That helps save energy.

8/20

Choose the sentence that best combines each pair of sentences given.

I never turn on the TV when leaving a room. That helps save energy.

I never turn on the TV when leaving a room, and which helps save energy.

I never turn on the TV when leaving a room, in which helps save energy.

I never turn on the TV when leaving a room, at which helps save energy.

I never turn on the TV when leaving a room, which helps save energy.

Giải thích

Đáp án đúng: D

Giải thích: Dùng dấu phẩy + which để bổ nghĩa cho cả mệnh đề trước.

Dịch nghĩa: Tôi không bao giờ bật TV khi rời khỏi phòng, điều đó giúp tiết kiệm năng lượng.