Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
Travellers___________their reservations well in advance if they want to fly during the Christmas holidays.
A. had better to get
B. had to get better
C. had better get
D. had better got
Travellers___________their reservations well in advance if they want to fly during the Christmas holidays.
A. had better to get
B. had to get better
C. had better get
D. had better got
had better + bare infinitive
Đáp án C.