-- Look at that girl. Is it Susan?
--No, it _______ be her. She has gone back to her home town .
| A．can't | B．mustn't | C．needn't | D．may not. |
I met Lucy in the primary school and we have been close friends ______.
| A．as usual | B．again and again | C．sooner or later | D．ever since |
On the top of the hill ______ an ancient tower with a history of more than 1, 000 years.
| A．stood | B．ran | C．came | D．lived |
—How many English words do you think I should know?
—As many as you ______. Then you will find reading quite easy.
| A．will | B．must | C．can | D．might |
Being honest is the first ______ if you want to make friends with others.
| A．step | B．time | C．job | D．hand |
Before the bridge was built ______ the river, the villagers had to take a boat to the other side.
| A．in | B．beside | C．across | D．along |