——Where is your father? I’m looking for him everywhere．
——He______ my grandmother surfing the Internet on the second floor．
| A．is teaching | B．teaches |
| C．has taught | D．Taught |
The radio says that a terrible traffic accident happened sometime ________ 8 a.m. ________ 10 a.m. this morning.
| A．between; and | B．from; to | C．between; to | D．from; and |
He made a mistake, but then he took action to change the situation ________ it got worse.
| A．until | B．when | C．before | D．because |
Having ________ exercise every day will do great good to your health.
| A．a lot | B．a number of | C．too much | D．plenty of |
— I’m new in Wuxi.
— Take a map of Wuxi with you. You’ll find it of great ________ in helping you to get round Wuxi.
| A．price | B．cost | C．interest | D．importance |
Look at the sign! It says “No Smoking!” You ________ smoke here. It’s dangerous.
| A．mustn’t | B．ought not to | C．needn’t | D．don’t have to |