20.The newly-built bridge ______ the beauty of the city.( )
A. | adds up to | B. | adds to | C. | adds up | D. | is added to |
18.Would it be for you to pick me up at four o'clock and take me to the airport?( )
A. | free | B. | vacant | C. | handy | D. | convenient |
15.---Shall we have a smoke here?
---No,we .Because the worker is carrying some petrol.( )
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---No,we .Because the worker is carrying some petrol.( )
A. | won't | B. | mustn't | C. | don't have to | D. | needn't |