The mother often makes the boy ____ his homework before supper.
| A．to finish | B．finish |
| C．finishing | D．finishes |
Keep the machine _______, and you will know how it works.
| A．run | B．to run | C．running | D．runs |
—What was Tom doing _______ it was raining?
—He was doing his homework in the bedroom.
| A．since | B．while | C．when | D．if |
Yesterday, a man said he saw _______ UFO in the park. The police are looking for _______ UFO now.
| A．an; the | B．the; the |
| C．a; the | D．the; an |
He _______ eight hundred thousand dollars for his Benz(奔驰) car.
| A．paid | B．cost | C．took | D．spent |
She told us that she _______ her handbag on the bus.
| A．left | B．forgot | C．missed | D．failed |