It used to be thought _____ the Earth was flat.
| A．as | B．when |
| C．since | D．that |
Go about your business your own way. Don’t _____what others think or say.
| A．care for | B．care about |
| C．care with | D．care of |
___________ to enter an ideal university, he worked harder than ever before.
| A．Determined | B．Determine |
| C．Determining | D．To determine |
No one tells us______, so we need your help.
| A．how we should do | B．what should we do |
| C．how to do it | D．what to do it |
It’s _______ hot here. We can’t stay here for a long time.
| A．much | B．very much |
| C．much too | D．too much |
Ladies and gentlemen, please fasten your seat belts. The plane ____________.
| A．takes off | B．is taking off |
| C．has taken off | D．took off |