◎ 题干
There        a lot of trees here, but now it has be come desert.            
[     ]
A. is              
B. was            
C. used to be        
D. used to was
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“Therea lot of trees here, but now it has be come desert.[ ]A. isB. wasC. used to beD. used to was…”主要考查了你对  【动词短语】【一般过去时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。