All passengers are expected to fasten the seatbelts when the plane takes off and lands.
| A．on the board | B．on board | C．on a board | D．on boards |
I tried to come closer to watch the bird, but as soon as it noticed me, ____ into the woods.
| A．did it fly away | B．away did it fly |
| C．away it flew | D．away flew it |
She _______ his number in the phone book to make sure that she had got it right.
| A．looked up | B．picked out |
| C．looked for | D．made out |
Teachers have to constantly update their knowledge in order to maintain their professional __________.
| A．consequence | B．independence |
| C．competence | D．intelligence |
I don’t like fish, so I ________ eat it unless I was extremely hungry.
| A．needn’t | B．shouldn’t |
| C．can’t | D．wouldn’t |
I have no idea ____________ measures the government will take to stop the river from being further polluted.
| A．which | B．what | C．that | D．whose |