This area is rich in coal，so habitants here use tons of coal to _____ electricity.
| A．offer | B．create | C．bring | D．generate |
He always prefers a bicycle rather than on a crowded bus .
| A．ride ; ride | B．riding ; ride | C．ride ; to ride | D．to ride ; ride |
I’m sorry you’ve been waiting so long , but it will be an hour David gets back .
| A．before | B．since | C．till | D．after |
Some wild animals _____ and killed at such a speed that they will disappear from the earth in the near future.
| A．hunted | B．have hunted | C．are being hunted | D．had been hunted |
Special attention should be _____ to air pollution wherever the factory will be built.
| A．made | B．paid | C．taken | D．sent |
I couldn’t find Peter, did I know where he had gone.
| A．but | B．nor | C．so | D．and |