MARK THE LETTER A, B, C OR D ON YOUR ANSWER SHEET TO INDICATE THE CORRECT ANSWER TO THE FOLLOWING QUESTION

Câu 13: Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question. The coffee was _________ . A. so strong that we cannot keep awake B. not strong enough to keep us awake C. such strong that we could keep awake D. enough strong to keep us awake