Not until _____ ten _____ to school.
| A．was he; he went | B．was he; did he go |
| C．he was; he went | D．he was; did he go |
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 |
. 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 |
If you keep on, you will succeed ________.
| A．in time | B．at one time | C．at the same time | D．on time |
—________ you__________ the editor at the airport?
—No, when we got there, he___________ driven away.
| A．Have; met; has been | B．Did; meet; had been |
| C．Did; met; have been | D．Have; met; was |
Does the way you thought of___________ water clean make any sense?
| A．making | B．how to make | C．to make | D．having made |