The students worked in groups to ________ the difficult problem in the math class.
| A． |
work out |
B． |
turn down |
C． |
cut off |
D． |
worry about |
—May I smoke here?
—No, you ______. This is a no-smoking room.
| A．needn’t | B．mustn’t | C．couldn’t | D．wouldn’t |
People who eat breakfast are always in ________ spirits than those who don’t.
| A．good | B．nice | C．better | D．best |
—Why didn’t you answer my phone call, Jack?
—I’m sorry, but I ________ then.
| A．drove | B．drives | C．was driving | D．have driven |
Please hope on you dream ______ one day it comes ture.
| A．if | B．until | C．unless | D．though |
The little boy ________ his seat to an old lady on the crowded bus.
| A．lent | B．offered | C．took | D．brought |