—Don't talk in the library. Always keep quiet here. —_________.
| A．I see. | B．Yes, I am. |
| C．I can. | D．I do. |
He suggested _______ by plane, but I thought it would cost too much.
| A．go | B．to go | C．going | D．gone |
Father won’t allow me to play outside ________ I wash up the dishes.
| A．if | B．unless | C．because | D．why |
Scientists can look _______ the huge telescope to find the planet.
| A．through | B．with | C．in | D．of. |
About _______ of students ______ reading stories in English in our class.
| A．one fifth; likes | B．one five; like |
| C．one fifth; like | D．one five; likes |
He watched TV for an hour. At 8 o’clock he stopped _______ his homework.
| A．do | B．doing | C．to do | D．did |