Over the past decades, sea ice _____ in the Arctic as a result of global warming

题型：浙江省高考真题难度：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

Tom _____ in the library every night over the last three months.A. works
B. worked
C. has been working
D. had been working

题型：北京高考真题难度：| 查看答案

Excuse me, Marcia, a reporter from Vanity Fair _____ all day. Could you speak to her now? [ ]
A. phones
B. has phoned
C. has been phoning
D. phoned

题型：辽宁省高考真题难度：| 查看答案

— Here is Paul! We _____ anxiously for him since last night.
— Maybe something happened to him.
A. waited
B. were waiting
C. had waited
D. have been waiting

题型：河南省模拟题难度：| 查看答案

How tired you look! You _____ these weeks. I think you need a holiday before you burn out.
A. had overworked
B. overworked
C. have been overworking
D. were overworked

题型：河南省模拟题难度：| 查看答案

— Did you find the missing couple in the mountain yesterday?
— No, but we ____ to get in touch with them ever since. [ ]
A. have tried
B. have been trying
C. had tried
D. had been trying

题型：黑龙江省模拟题难度：| 查看答案