Usually pilots need about a decade of experience _______ they can be promoted to captain.
| A．after | B．before | C．then | D．when |
The news that the scientists in China are trying the ways to reduce the fog and haze was ______ on the radio yesterday.
| A．turned out | B．found out |
| C．given out | D．carried out |
—Darling, the headache ________ me.
— No wonder, you _________ the South Korean TV soaps since last night.
| A．kills; have watched |
| B．is killing; have been watching |
| C．is going to kill; were watching |
| D．was killing; had watched |
What would have happened, ______, as far as the river bank?
| A．Edward Snowden had walked farther |
| B．if Edward Snowden should walk farther |
| C．had Edward Snowden walked farther |
| D．if Edward Snowden walked farther |
---Where do you want to travel for summer, Canada or America?
---________ There’re so many nice places at home, you know.
| A．So what? | B．Why not? |
| C．How come? | D．Why bother? |
After finding her car stolen, ______.
| A．a policeman was asked to help |
| B．the area was searched thoroughly |
| C．it was looked for everywhere |
| D．she hurried to a policeman for help |