As teenagers, it is not until we are able to face difficulties bravely we are mature enough.
| A．which | B．when | C．that | D．whether |
22. Nobody wants to________ especially in public.
| A．make fun of | B．be made fun of | C．making fun of | D．made fun of |
21. At first she was not accustomed to _________ in the new company, but eventually she managed to get through and get on well with her companions.
| A．working | B．works | C．worked | D．work |
20. In many places in China, ____ bicycle is still _____ popular means of transportation.
| A．a; the | B．/; a | C．the; a | D．the; the |
19. My grandpa has many hobbies which _________ from collecting stamps to planting flowers.
| A．range | B．ranged | C．vary | D．Varies |
18. It was ______ back home after the experiment.
| 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 |