.
All passengers ______, please fasten your seat belts and remain seated ______ the plane is landing.
| A．on board; before | B．abroad; since | C．on the board; after | D．aboard; when |
I’m afraid I’m not ________ to help with the talent show, for I am occupied with my own project.
| A．reliable | B．convenient |
| C．available | D．accessible |
Students are advised to keep the list of books near the desk for easy ________.
| A．preference | B．reference |
| C．purpose | D．function |
In society where social roles are determined, boys usually copy the behavior of their fathers, and girls _______ of their mothers.
| A．that | B．those | C．one | D．the ones |
--Congratulations, Tom! You have won the first prize in the physics competition.
--Don’t _______. I’m not good at physics, you know.
| A．be a wet blanket | B．pull my leg |
| C．have green fingers | D．be all ears |
Peter wasn’t saying anything but his boss smiled at him ______ he had done something very clever.
| A．while | B．even if |
| C．as though | D．though |