I met my teacher _____ I was walking in the street, but I didn’t say hello to him.
A.before B.after C.until D.while
There was a rainstorm yesterday. The flood _____ the old bridge over the small river.
A.washed away B.went away
C.blew away D.put away
She finished the work _____ as soon as possible. She’s very happy now.
A.succeed B.successfully
C.success D.successful
It’s a good song, _____ the lyrics（歌词）are not good enough.
A.which B.although C.and D.so
—Do you know him?
—I’m sure I’ve seen him _____, but I can’t remember the right place.
A.anywhere B.nowhere C.everywhere D.somewhere
What can we students do _____ the environment?
A.to protect B.protected
C.protecting D.protects
