III:
Mark the letter A, B, C, or D on your answer sheet that completes each of the following questions or that is closest in meaning to the underlined part.
Trả lời câu hỏi dưới đây:
If you don’t understand, don’t hesitate __________ .
Đáp án là B. hesitate + to V: lưỡng lự, do dự ….