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题目
题型:不详难度:来源:
I am tired. I ______ all day.
A.am workingB.have been workingC.workedD.have been worked

答案
B
解析
本题句意“我很累。我一直在工作。”all day说明时间的持续。
核心考点
试题【I am tired. I ______ all day.A.am workingB.have been workingC.workedD.have been 】;主要考察你对一般现在时等知识点的理解。[详细]
举一反三
I could have turned to Mr. Smith for help, but he ______ too busy then.
A.isB.wasC.should beD.has been

题型:不详难度:| 查看答案
— I will come to attend your lecture at 10:00 tomorrow.
— I’m sorry, by then my lecture will have ended and I _____ in my office.
A.is being workedB.will work C.will be working D.will have worked

题型:不详难度:| 查看答案
His sister left home in 1998, and__________ since.
A.had not been heard ofB.has not been heard of
C.had not heard ofD.has not heard of

题型:不详难度:| 查看答案
Edward, you play so well. But I __________ you played the piano.
A.didn’t knowB.hadn’t known
C.don’t knowD.haven’t known

题型:不详难度:| 查看答案
—When__________ and visit our exhibition next month?
— When_______, I will let you know.
A.will he come; he will come
B.will he come; he comes
C.does he come; he will come
D.does he come; he comes

题型:不详难度:| 查看答案
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