—I'm a teenager's mother. Sometimes I don't know ____.
—Maybe he suffers from stress.
| A．what does my son want to get | B．what my son needs most |
| C．why is my son often angry | D．why my son gets angry very oft en |
I find it _____ that I can’t speak English well.
| A．frustrate | B．frustrating | C．frustrated | D．to frustrate |
.I used to ______ a lot of time __________ games with my friends.
| A．take; to play | B．cost; playing | C．spent; on | D．spend; playing |
---It’s good for you to _______ in class.
--- I think so. Thank you.
| A．get into trouble | B．make a lot of noise | C．laugh at others | D．take notes |
I can’t afford ______ the white car, it’s too expensive.
| A．to buy | B．buying | C．in buy | D．in buying |
______ he became seriously ill, he still went on working.
| A．If | B．Unless | C．And | D．Even though |