I often see him _______ uniforms.
| A．wears | B．wearing | C．wear | D．to wear |
--- What is he doing for vacation?-- He’s _______________.
| A．going camp | B．go camp | C．go camping | D．going camping |
I think walking is________ our health.
| A．good at | B．bad at | C．well in | D．good for |
We're tired because we have ________ yin.
| A．too many | B．too much | C．many too | D．much too |
Do you think ________ necessary to take the second turning?
| A．him | B．it | C．I | D．that |
I try to eat junk food only once a month _____ I love it.
| A．through | B．but | C．and | D．although |