Before the booming of e-commerce, people used to ______ their holidays through travel agents.
A: book
B: having booked
C: booking
D: have booked
A: book
B: having booked
C: booking
D: have booked
举一反三
- Before the age of the Internet, we used to ____ our holidays through travel agents. A: Book B: having booked C: ooking D: have booked
- Before the age of Internet, we used to _________our holidays through travel agents. A: ook B: ooking C: having booked D: have booked
- Before the age of the Internet, we used to _______ our holidays through travel agents.
- Have you ______ your ticket? A: book B: books C: booked D: booking
- He’s fully ____ this morning. A: book B: booked C: has booked D: booking