¾ Who invented _______ cell phone?
¾ I don’t know. Maybe _______ European.
| A．the; an | B．the; a | C．/; / |
D．a; the |
It was _____back home after the experiments.
| A．not until midnight did he go | B．until midnight that he didn’t go |
| C．not until midnight that he went | D．until midnight when he didn’t go |
The car accident on the main road the other day ________ the careless driving of a driver.
| A．was due to | B．resulted in |
| C．led to | D．was resulted from |
I ordered _______pizza and salad. _______ pizza was nice but the salad was terrible.
| A．a;The | B．a;不填 | C．the；the | D．the；不填 |
______ a certain doubt among the people as to the practical value of the project.
| A．It has | B．They have | C．It remains | D．There remains |
Remember that you won't be able to cancel the contract ____you've signed.
| A．before | B．until | C．once | D．though |