The bus _______ at 8:30 p.m., so I have to be at the station by 8:10 at the latest.
| A．has left | B．would leave | C．leaves | D．will have left |
We will ______ all the natural resources if we continue consuming them like that.
| A．run out | B．wipe out | C．drop out | D．hold out |
The village has developed a lot ________ we learned farming two years ago.
| A．when | B．which | C．that | D．where |
The kitchen is often the busiest room in a household, so it’s important to make sure it _____well.
| A．smoothes | B．functions | C．pays | D．measures |
______ label to each of the trees, with detailed introduction of their features, and visitors will know more about them and how to protect them.
| A．To attach | B．Attach | C．Attached | D．Having attached |
Some young people these days just ______ go out of their homes to contact the real world．
| A．mustn’t | B．won’t | C．mightn’t | D．shouldn’t |