We ________ on this project for four hours. Let"s have a rest.[     ]A. are work

We ________ on this project for four hours. Let"s have a rest.[     ]A. are work

题型:同步题难度:来源:
We ________ on this project for four hours. Let"s have a rest.[     ]
A. are working  
B. have been working
C. worked  
D. had worked
答案
B
举一反三
Kate ________ on her new novel, which is supposed to come out next month.[     ]
A. has been working  
B. had worked
C. will be working  
D. was working
题型:同步题难度:| 查看答案
The temperature ________ to minus 3 in London and it is likely to get even colder as the day goes on.[     ]
A. will have fallen  
B. had fallen
C. has been falling  
D. falls
题型:同步题难度:| 查看答案
The number of foreign students attending Chinese universities ________ rising steadily since 1990.[     ]
A. is  
B. are
C. has been  
D. have been
题型:同步题难度:| 查看答案
Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company.   [     ]
A. worked  
B. has been working  
C. is working    
D. works
题型:同步题难度:| 查看答案
— I _____ to get through to her all day, but no one answered the phone.  
— Relax yourself. She will be all right.
A. try
B. have tried
C. have been trying
D. tried
题型:黑龙江省月考题难度:| 查看答案
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