We spent about one-third of our lives sleeping. We know relatively little about sleep

10/21

We spent about one-third of our lives sleeping. We know relatively little about sleep.

We know relatively little about sleep, as a result, we spend about one-third of our lives sleeping.

We shall know more about sleep if we spend more than one-third of our lives sleeping.

We spend about one-third of our lives sleeping so that we know relatively little about sleep.

Despite spending about one-third of our lives sleeping, we know relatively little about sleep.

Giải thích

Đáp án D

Chúng ta đã dành ra 1/3 cuộc đời để ngủ. Chúng ta biết rất ít về giấc ngủ.

= Mặc dù dành ra 1/3 cuộc đời để ngủ, nhưng chúng ta biết rất ít về giấc ngủ.

Cấu trúc câu tương phản, đối lập: Despite N/V-ing, S V O (Mặc dù…, nhưng…).