It’s bad for us to __________ at night.A. stand up B. take up C. stay up
---Don’t you go to school by bike? --- .
--- How long have you _________ there? --- For about one week.
I'm expecting a pet dog for long,but mom has no time to buy _________ for me.
Michael Jordan is a man who never gives up in his life. And that's _________ he succeeds.
Auatar(阿凡达)is such _________ wonderful science fiction movie that I want to see it _________ second time.