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 |
Standing there，I could almost smell the rain coming．And it did．Suddenly the lightning flashed through the clouds，nearlyme．
| A．having blinded | B．blinded | C．blinding | D．to blind |
In America．a friend's inviting you to a restaurant doesn't mean that he or she will pay for the mealyou are told in advance．
| A．unless | B．if | C．although | D．until |
Cheer up! Everyone may have periods in their liveseverything seems tough．
| A．when | B．where | C．which | D．that |
Though the suspect refused to admit that he had stolen the precious diamond at first．heand admitted everything when he was shown the videotape．
| A．broke up | B．broke away | C．broke down | D．broke into |
Encourage your children to try new things，but try not tothem too hard．
| A．draw | B．strike | C．rush | D．push |