________ 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 |
The government has to close those small factories to prevent the water of the river ______.
| A．polluting | B．from polluting |
| C．being polluted | D．polluted |
Some of the doctors are paid almost ______ as the nurses.
| A．twice as much | B．much as twice |
| C．as much twice | D．as twice much |
______ I’m well again, I can go on with my work.
| A．Even if | B．As though |
| C．Ever after | D．Now that |
He wants to see changes in the company and I am sure he will, ______.
| A．on time | B．at a time | C．at one time | D．in time |
________ seems strange to us is ________ the troublesome boy is getting along well with all his teachers.
| A．It; that | B．What; how | C．It; how | D．What; that |