Class regulations require _____ is the last to leave the classroom _____ off all the lights.
| A．who; should turn | B．whom; shall turn |
| C．whomever; turns | D．whoever; turn |
There are still a few jobs to __________ so we cannot be released for the time being.
| A．break off | B．finish off | C．put off | D．clear off |
Our company has a new system to help __________ the best service __________ the customers.
| A．provide; / | B．provide; to | C．provide; for | D．supply; / |
It is in Qingdao __________ you're going to pay a visit to __________ this kind of washing machine is produced.
| A．/; that | B．where; which |
| C．/ J where | D．that; which |
I had neither a raincoat nor an umbrella. __________ I got wet through.
| A．It's the reason | B．That's why |
| C．There's why | D．That's because |
I am really a bit worried because I have no idea what my parents' __________ will be to my poor examination result.
| A．expression | B．reaction | C．appearance | D．expectation |