18.Please do me a favor-_____ my friend Mr.Smith to Youth Theater at 7:30tonight.( )
| A. | to invite | B. | inviting | C. | invite | D. | invited |
17.My parents have promised to come to see me before I _____ for Africa.( )
| A. | have left | B. | leave | C. | left | D. | will leave |
16.He found that complex problems,especially those _____ abstract thinking,were best for picking out bright and dull students.( )
| A. | involve | B. | involved | C. | involving | D. | being involved |
14.The long and tiring talk,filled with arguments and quarrels,ended in disorder, _________ no agreement at all.( )
| A. | reaching | B. | reached | C. | to reach | D. | being reached |
13.Many people prefer large cars,_____ large cars are safer than small ones.( )
| A. | thinking | B. | to think | C. | think | D. | having thought |
12.To our disappointment,the trip we had been looking forward to __________ in the pouring rain.( )
| A. | starting | B. | start | C. | to start | D. | started |
11.-You just said you hate your brother.Why?
-He is a black sheep of the family,always _____ trouble to my family.( )
-He is a black sheep of the family,always _____ trouble to my family.( )
| A. | make | B. | makes | C. | made | D. | making |
10.Mr.Brown,chairman of the trade union,will visit our factory in ____ month of May.( )
| A. | a | B. | an | C. | / | D. | the |
9.If we can make most of renewable energy sources,there will be big rise in the environmental quality.( )
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| A. | /,/ | B. | the,a | C. | the,/ | D. | /,a |