Look! The students _____ the classroom.
| A．clean | B．are cleaning | C．are clean | D．cleaning |
You’d better speak aloud ______ we can hear you.
| A．so that | B．as … as |
| C．as if | D．since |
—It’s very hot, but quite wet today.
—_____
| A．So it is. | B．It is so. |
| C．So is it. | D．So it does. |
Now most families have only one child _____ our country’s one-child policy.
| A．so | B．because |
| C．because for | D．because of |
There are fifty students in our class, _____ of us _____ football.
| A．two third; likes | B．two three; like |
| C．two thirds; likes | D．two thirds; like |
Xi’an is a city with many places of interest and _____ tourists come here every year.
| A．thousand of | B．thousand |
| C．thousands | D．thousands of |