—_______ do you play computer games?
—Every night.
| A．How long | B．When |
| C．How much | D．How often |
—How many teachers are there in your school?
—About two _________.
| A．hundred of | B．hundreds of | C．hundreds | D．hundred |
— Could you look after my pet dog for me while I am away?
— _______.
| A．No, thanks | B．Yes, I could | C．With pleasure | D．I am sure you will |
— What’s your plan for this weekend?
— We will go for a picnic by the river _______ it rains.
| A．unless | B．if | C．but | D．because |
—Why was he late for school yesterday?
— He overslept. By the time he got to the bus stop, the bus ________ already ______.
| A．has; left | B．had; left | C．was; leaving | D．have; left |
—Heavy smog (雾霾 )in eastern and central China seems to get more and more serious.
—I agree. Something to deal with it.
| A．has done | B．is doing | C．must be done | D．must do |