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 |
He didn’t go to bed _______ his mother came back.
| A．until | B．if | C．as soon as | D．when |