---Bad luck! I ________ the sidewalk when an Audi cut in and knocked me down.
---You can never be too careful!
| A．crossed | B．have crossed |
| C．was crossing | D．had been crossing |
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 |
You can’t see the___________ now for they are having a meeting at the moment.
| A．editor-in-chiefs | B．by an hour |
| C．by hour | D．each hour |
The two sides have finally___________, though some small differences still exist.
| A．made a decision | B．reached an agreement |
| C．settled down | D．broken up |