We _____ on this project for four hours. Let"s have a rest. [ ]A. are workin
题型：专项题难度：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
— Have you received any phone calls from your sister?
— Not yet, but we ______ to get in touch with her ever since she left us. |
[ ] |
A. have tried
B. tried
C. are trying
D. have been trying |
— I wonder if you can go shopping with me together.
— Sorry. I _____ a letter all the morning and haven"t finished it yet. |
[ ] |
A. am writing
B. was writing
C. have written
D. have been writing |
| I ____ to reach the manager for the last two hours but the line is always busy. |
[ ] |
A. tired
B. have tired
C. had tired
D. have been trying |
| Mike _____ his wedding for a whole month and hopefully everything will be ready tomorrow. |
[ ] |
A. prepares
B. is preparing
C. had prepared
D. has been preparing |
| Hi, Peter! I haven"t heard much from you lately. What ______ you ______? |
[ ] |
A. have…done
B. have… been doing
C. did…do
D. are…going to do |
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