Mark the letter A, B, C, or D to indicate the sentence that is closest in meaning to the following question.

The coffee was not strong. It didn't keep us awake.

A. The coffee was not enough strong to keep us awake.

B. The coffee was very strong, but it could keep us awake.

C. The coffee was not strong enough to keep us awake.

D. We were kept awake although the coffee was not strong.

Đáp án đúng: C

Không đủ để làm gì: S + be + not + adj + enough + to V…

Dịch nghĩa: Cà phê không mạnh. Nó không thể khiến chúng tôi tỉnh táo. = Cà phê không đủ mạnh để khiến cho chúng tôi tỉnh táo.