In the past decades, sea ice ____ in the Arctic as a result of global warming.[ 

In the past decades, sea ice ____ in the Arctic as a result of global warming.[ 

题型:河南省模拟题难度:来源:
In the past decades, sea ice ____ in the Arctic as a result of global warming.[     ]
A. had melted  
B. has been melting
C. melted  
D. is melting
答案
B
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:江苏模拟题难度:| 查看答案
The development of China"s economy ________ since the 80s of last century.     [     ]
A. has been accelerating
B. had accelerated
C.is accelerating    
D. accelerated
题型:山东省模拟题难度:| 查看答案
The company         a rise in salary for ages but nothing has happened yet. [      ]
A.has been promising
B.had promised
C.promised
D.promises
题型:安徽省同步题难度:| 查看答案
-I"m sure Andrew will win the first prize in the final.
-I think so. He________for it for months.  [     ]
A. is preparing    
B.was preparing
C. had been preparing    
D.has been preparing
题型:同步题难度:| 查看答案
— How long ______ like this?    
— For nearly a week.    A. did it rain                      
B. has it rained    
C. does it rain                  
D. has it been raining
题型:同步题难度:| 查看答案
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