About _________ of the teachers in tour school were born in ________.
| A．two thirds, 1970 | B．two thirds, the 1970s |
| C．two thirds, 1970s | D．two third, the1970 |
Billy is so tired _____ he worked all night in his office.
| A．when | B．because | C．if | D．so |
We must stop _____down trees if we don’t want a world without them.
| A．cut | B．to cut | C．cutting | D．cuts |
Are your parents strict_____ your school work ?
| A．to | B．of | C．with | D．about |
Alice and I often study and play_____ table tennis together.
| A．a | B．an | C．the | D．/ |
My hair is too long. I want to get it _______.
| A．cut | B．to cut | C．cutting | D．cuts |