They arrived at the finishing line________the same time．We didn’t know who the winner was．
| A．on |
| B．in |
| C．at |
| D．for |
It seems hopeless to get there on time because there is little time ________.
| A．leaving | B．left |
| C．to leave | D．leaves |
Forty-five percent ________ the teachers ________ women in our school.
| A．of; is | B．of; are |
| C．不填; are | D．不填; is |
Barack Hussein Obama, the present president of the USA, ________ a naughty (调皮的) boy at school.
| A．was used to be | B．was used to being |
| C．used to be | D．used to being |
The boy is often made pictures for hours by his mother.
| A．to draw | B．to drawing |
| C．draw | D．drew |
For the present, I can’t afford ________ a car.
| A．to buy | B．buy | C．buying | D．for buying |