Over the past decades, sea ice _______ in the Arctic as a result of global warmi

题型：浙江省月考题难度：来源：

Over the past decades, sea ice _______ in the Arctic as a result of global warming. [     ]
A. had decreased
B. decreased
C. has been decreasing
D. is decreasing

答案

举一反三

I __________ glasses since I was in primary school and I hate them. They make me look
like a bookworm. [     ]
A. have worn
B. have been wearing
C. have been worn
D. was wearing

题型：浙江省模拟题难度：| 查看答案

— What"s the price of petrol these days ?
— It _______ frequently since last year .  [     ]
A. is arisen
B.  increased
C. has been rising
D. has raised

题型：浙江省模拟题难度：| 查看答案

They   ____ on this project for l 4 hours, but it’s so difficult to persuade them to have a rest.    [     ]
A. had worked
B. have been working
C. worked
D. are working

题型：河北省模拟题难度：| 查看答案

— Jack, do you know anything about Doctor Brown?
— I ______ to him for years. I don"t see how anyone else could do better. [ ]
A. went
B. will go
C. had gone
D. have been going

题型：北京模拟题难度：| 查看答案

— Have you watched the nine o"clock news?
— No. I ______ my homework at home all the morning.
A. had done
B. have done
C. did
D. have been doing

题型：天津期末题难度：| 查看答案