题目内容
1.One third of the area _____ covered with trees.About seventy per cent of the trees_____been planted recently.( )A. | is; has | B. | is; have | C. | are; has | D. | is; had |
分析 1/3的地区覆盖着树.约70%的树是最近种植的.
解答 答案是B.考查谓语动词的单复数形式.根据英语语法,"分数或百分数+of the+名词或代词"作主语时,谓语动词的单、复数形式取决于名词或代词的单、复数形式.One third of 后面的名词area是不可数名词,所以谓语用be动词的单数形式is;seventy per cent of 后面的名词trees是复数形式,所以谓语用复数形式,句中时间状语recently表面句子是现在完成时态,所以用助动词have.故选B.
点评 解答此类题目首先要掌握时态的用法及谓语动词的单复数规则,然后根据语境选择正确的答案.
练习册系列答案
相关题目
9.You may send me an e-mail or just give me a call._____ will do.( )
A. | Neither | B. | Each | C. | Any | D. | Either |
13.The mother was trembling with anger.She _______ her son and said nothing.( )
A. | glanced at | B. | looked at | C. | .stared at | D. | .glared at |
10.In 2012,scientists in Hubei invented the country's first optical clock,which measures time much more
than the traditional timekeepers.( )
than the traditional timekeepers.( )
A. | properly | B. | skillfully | C. | formally | D. | accurately |