3．Jack.along with his classmates.was working on the project when the teacher came in．——青夏教育精英家教网——

3．Jack，along with his classmates，was working （work） on the project when the teacher came in．

2．His laziness led to hisbeing defeated （defeat）．

1．Throughout the world there is a growingconcern （关心） over the environmental effects of social and economic development efforts．

20．The system has been designed to giver the user quick and easyaccess （使用） to the required information．

19．With examsapproaching （临近），it's a good idea to review your class notes．

18．The farmers werefirmly （坚定地） convinced that they were the rightful owners of the lands．

17．At lunch，the radioforecast （预报） that the mist would become a thick fog in the afternoon．

16．________ I can't understand is ________ he wants to change his mind．（　　）

15．Many people believe that hunger is only a problem in the developing world．________，it is a problem all over the world．（　　）

On the contrary

14．You can only be sure of________ you have at present； you cannot be sure of something ________ you might get in the future．（　　）

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