When the airplane takes off ， the passengers are told to _______ their seat belts.
举一反三
- Before the flight takes off, all the passengers are asked to (fast) ______ their seat belts.
- As the airplane was getting ready for taking off, we are asked to ________ our seat belts. A: link B: fasten C: close D: lock
- Passengers must fasten their seat belts during take-off or landing.
- 中国大学MOOC: All the passengers _____ board the plane should fasten their seat belts.
- All the passengers _____ board the plane should fasten their seat belts. A: to B: in C: on D: at