Three fourth of the homework _______ today .
| A．has finished | B．has been finished | C．have finished | D．have been finished |
The reason __________ he explained was __________ he was ill and unable to go to school.
| A．why; that | B．why; because |
| C．which; because | D．which; that |
Last week I bought a cellphone，__________ was very reasonable.
| A．price of which | B．the price of whom |
| C．of which price | D．whose price |
Many countries are now setting up national parks __________ animals and plants can be protected.
| A．when | B．which |
| C．whose | D．where |
A bank is the place __________ they lend you an umbrella in fair weather and ask for it back when it begins to rain.
| A．when | B．that |
| C．where | D．there |
Whatever is left over may be put into the refrigerator，__________ it will keep for two or three weeks.
| A．when | B．which |
| C．where | D．while |