Someone called me up in the middle of the night, but they hung up I could answer the phone.
A．as B．since C．until D．before
-You look so worried, what’s wrong? -More and more people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.
A．water B．air C．noise D．Soil
The iPad isn’t ______. It belongs to ______.
A．he; me B．her; mine C．his; me D．hers; mine
Look ! There’s ______ football under the teacher’s desk. Let’s play ________ football, OK?
A．/, / B．a, / C．a, the D．a, a
It is dangerous for teenagers to give out too much about themselves on the Internet.
A．information B．questions C．ideas D．knowledge
—Is John coming by train?
—He should, but he not. He likes driving his car, but I’m not quite sure.
A．must B．can C．may D．need
