His __________ towards work left us a good impression.
| A．style |
| B．attitude |
| C．opinion |
| D．method |
My MP4 has disappeared. Who _______ have taken it away?
| A．could. | B．should | C．must | D．might |
The government has taken some measures to solve the shortage of electricity, but it may be some time ______ the situation improves.
| A．since | B．when | C． before | D． unless |
He reminded me that the poor weather may have ＿＿＿ the small crowd.
| A．turned up | B．spied on | C．accounted for | D．came across |
I have no idea ＿＿＿ David is in trouble, he will turn to you for help.
| A．if | B．that | C．when | D．that if |
Who do you think Mr. Brown had ＿＿＿ within three months?
| A．driven | B．driving | C．drive | D．to drive |