—How clean the window is ! —Yes.It just now. [ ]A. ha

题型：专项题难度：来源：

—How clean the window is !
—Yes.It      just now.    [     ]
A. has been cleaned
B. was cleaned
C. is cleaned
D. willbe cleaned

答案

举一反三

Old people must         .     [     ]
A. be spoken to politely
B. speak to polite
C. be spoken politely
D. speak polite

题型：专项题难度：| 查看答案

Millions of trees            around our city every year. Our environment is getting better.  [     ]
A. are planting
B. were planted
C. planted
D. are planted

题型：专项题难度：| 查看答案

Professor Yi Zhongtian _ to the Talk Show on CCTV-1 last weekend. [ ]

A. invites
B. invited
C. was invited

题型：专项题难度：| 查看答案

Do you know when basketball             ?      [     ]
A. is invented
B. was invented
C. has invented
D. had invented

题型：专项题难度：| 查看答案

Mike wasn"t at home yesterday. He       to  help with Jenny"s English.    [     ]
A. was asking
B. is asked
C. is asking
D. was asked

题型：专项题难度：| 查看答案