There is no doubt the earth is becoming warmer.
| A．whether | B．that | C．if | D．why |
Progress ________very good so far and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
Don’t be angry with him. He didn’t make the mistake _______.
| A．in turn | B．on purpose | C．by accident | D．in total |
Much attention should be paid _________people’s living conditions.
| A．in improving | B．to improve | C．improving | D．to improving |
You can eat food free in my restaurant ________ you like.
| A．whenever | B．wherever | C．whatever | D．however |
Hurry up, ________you’ll miss the bus.
| A．and | B．while | C．but | D．or |