—Have you handed in your schoolwork yet?—Yes, I have. I guess it now.[

题型：同步题难度：来源：

—Have you handed in your schoolwork yet?
—Yes,  I have. I guess it          now.[     ]
A. has graded
B. is graded
C. is being graded
D. is grading

答案

举一反三

Although the causes of cancer         , we do not yet have any practical way to prevent it．    [     ]
A．are being uncovered
B．have been uncovering
C．are uncovering
D．have uncovered

题型：同步题难度：| 查看答案

With more forests being destroyed, huge quantities of good earth          each year.       [     ]
A. is washing away
B. is being washed away
C. are washing away
D. are being washed away

题型：同步题难度：| 查看答案

— What is that noise?
— Oh, I forgot to tell you that the new machine_____ .[ ]
A. was tested
B. will be tested
C. has been tested
D. is being tested

题型：安徽省模拟题难度：| 查看答案

It is reported that many a new house       at present in the disaster area. [     ]
A. are being built
B. were being built
C. was being built
D. is being built

题型：西藏自治区月考题难度：| 查看答案

—Hi, Tom, can I use your computer for a while this afternoon?
—Sorry. ________.[ ]
A. It"s repaired
B. It"s being repaired
C. It has been repaired
D. It had been repaired

题型：福建省期末题难度：| 查看答案