________ you eat the correct foods ________ be able to keep fit and stay healthy.
| A．Only if；will you |
| B．Only if；you will |
| C．Unless；will you |
| D．Unless；you will |
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 |