We’ll never forget the days ______ we lived in the country.
| A．when | B．where | C．which | D．不填 |
Some people are good at _____ voices on the phone while others ______.
| A．knowing; aren’t | B．recognizing; don’t | C．knowing; don’t | D．recognizing; aren’t |
Pandas are native ______ China.
| A．with | B．to | C．for | D．in |
No product is allowed to go into the market if it fails to _____ the quality standard.
| A．live | B．come up to | C．meet | D．go through |
When was it _____ your parents took you to Hangzhou?
| A．before | B．if | C．which | D．that |
It is everyone’s duty to ______ our school a pleasant place to learn in.
| A．find | B．set | C．keep | D．make |