Be careful . You _______ cross the road when the traffic light is red . The traffic is heavy at this time of day .
| A．must | B．mustn’t |
| C．can | D．needn’t |
The sick boy ____________ to hospital by the police yesterday.
| A．is taken | B．was taken | C．takes | D．took |
She ____________ as an animal trainer since 2003.
| A．has worked | B．works | C．will work | D．worked |
If I find his phone number，I ____________ you.
| A．tell | B．told | C．will tell | D．have told |
They ____________ her to the party，so she was very happy.
| A．invite | B．invited | C．will invite | D．are inviting |
—____________you swim? —Yes，but I’m not a good swimmer.
| A．Can | B．May | C．Need | D．Must |