You have to__what time the train leaves before you book the ticket.
A: sure
B: make certain
C: be sure
D: be certain
A: sure
B: make certain
C: be sure
D: be certain
举一反三
- Before you start, make sure you have a clear idea of why you are starting a company.
- Are you （）of travel. A: sure B: proud C: certain D: fond
- If you want to leave deep impression on somebody, you’d better make sure to have _______ before the conference.
- At hotel, before you turn on the TV, you should make sure that you have a clear understanding of the method of payment and the side of the bill._
- v. to make sure or certain; guarantee; secure