—Must I take part in the activity?
—No, you _______. You’re too young. You should look after yourself.
| A．mustn’t | B．don’t |
| C．can’t | D．don’t have to |
– has he lived in Canada? --Since 1998.
| A．How soon | B．How far | C．How long | D．How often |
Ann is looking forward to her new pen friend.
| A．meet | B．meets | C．meeting | D．Met |
The maths problem is so difficult that none of them can .
| A．work out it | B．work it out | C．find out it | D．find it out |
The foreigners have been in Beijing for three years, so they are familiar the city .
| A．to | B．with | C．for | D．On |
We should try our best English well.
| A．learn | B．to learn | C．learnt | D．to learning |