题目内容

In the past few years, sea ice ____ in the Arctic as a result of global warming.
A．had meltedB．has been melting C．meltedD．is melting
B
考查时态。根据in the past few years可知是与完成时连用的，在根据句意是指海冰一直都在融化。所以使用现在完成进行时。句意：在过去几年里，因为全球变暖，海冰一直在融化。
练习册系列答案
相关题目
__________ to sun, rain and wind for a long time, the stone split（裂开）.
A．Being exposedB．Having exposedC．ExposedD．To expose
Our friendship _____ quickly over the weeks that followed.
A．had developed B．was developingC．would develop D．developed
So far a total of 19 cases______ and another 36 people are being treated on the assumption that they are infected with Legionnaires Disease.
A．were confirmedB．have confirmedC．are confirmedD．have been confirmed
When I said some students were so lazy, I ___to you.
A．don’t referB．wasn’t referringC．didn’t referD．hasn’t referred
He said that he _______ to Shanghai the next day.
A would go            B went             C had gone           D would have gone
His father told me that he ____  for the United States three days _______.
A．has left; agoB．had left; agoC．left; agoD．had left; before
I will stay at home and read some books if it ________ tomorrow.
A．rainB．will rainC．rainsD．is going to rain
-----Is this the first time you______ Chengdu?
-----No. But the first time I______ here, the city wasn’t so beautiful
A．visited; cameB．visited; have come
C．have visited ; have comeD．have visited; came

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网