Over the past decades, sea ice _____ in

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问题选择题

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

答案：C

连词成句

连词成句，注意标点符号及大小写。

1. need, we, some, chicken

2. I, borrow, may, pencil, your

3. you, do, have, apples, any

4. I'll, twelve, please, take

5. salt, we, some, and, pepper, need

判断题

在煤矿井里禁止明火，主要是为了防止煤层燃烧。