_________ water to grow is well-known.
| A．That trees need | B．These trees need |
| C．That tree needs | D．Trees need |
If the building project ___ by the end of this month is delayed, the construction company ___ fined.
| A．will be completed; is to be | B．to be completed; will be |
| C．being completed; will be | D．completed; was |
The air pollution of the city ____ by 20 percent thanks to the strict measures taken by the government.
| A．has been fallen down | B．has been increased |
| C．has been reduced | D．has been risen |
Be careful when you cross this very busy street. If not, you may ____ run over by a car.
| A．have | B．get | C．become | D．turn |
I feel it is your husband who ___ for the spoiled child.
| A．is to blame | B．is going to blame | C．is to be blamed | D．should blame |
. The silence of the library ___ only by the sound of pages being turned over.
| A．has been broken | B．breaks | C．broke | D．was broken |