44. We must _____ good relations with our classmates because co-operation is essential to us, modern people.
| A．do | B．put | C．build | D．Set |
_________ so busy, she would come to help you.
| A．Should my daughter | B．Was my daughter not |
| C．If my daughter were not | D．If my daughter isn't |
Without the air to hold some of the sun's heat, the earth at night _________，too cold for us to live.
| A．would be coldly freezing | B．would be freezing cold |
| C．would be frozen cold | D．will freeze coldly |
_________his teacher, Li Ming wouldn't have passed the Englishexam so easily.
| A．If it hadn't been | B．Hadn't it been |
| C．Had it not been for | D．Were it not for |
The beautiful lady _________ to be a skilled thief.
| A．is turned out | B．turned out |
| C．turned | D．considered |
It is those who are _________ of the matter that should answer for it, so don't be worried.
| A．involved | B．associated |
| C．accused | D．related |