________of the land in that area________covered with trees and grass.
| A．Two fifth；is | B．Two fifth；are |
| C．Two fifths；is | D．Two fifths；are |
__________ full preparations, we decided to put off the meeting till next week.
| A．We did not make | B．Having not made |
| C．We had not made | D．Not having made |
You ________ pay too much attention to your reading skill, as it is so important.
| A．can not | B．should | C．must | D．needn't |
In such dry weather, the flowers will have to be watered if they ____________
| A．have survived | B．are to survive |
| C．would survive | D．will survive |
It is the protection for the trees___________ really matters, rather than how many trees are planted.
| A．what | B．that |
| C．不填 | D．which |
We can’t go on with the experiment because the computer_________.
| A．hasn’t been repaired | B．hasn’t repaired |
| C．is not repaired | D．hadn’t been repaired |