题目内容
【题目】The number of private cars in China ________ since 2005, but only 15 percent of them ________ made in China.
A. has been increasing; areB. have increased; is
C. has been increased; isD. had increased; are
【答案】A
【解析】
试题分析:考查动词时态。根据since 2005,再根据动作是一直进行,所以用现在完成进行时,主语是The number of,谓语动词用第三人称单数形式;第二空主语是only 15 percent of them,them指cars,可知谓语动词用复数形式,句意:自从2005年以来,中国的私家车数量一直在增长,但是只有15%是中国制造的。故选A。
【知识拓展】
1.The number of作主语,后面的谓语动词用单数形式。The number of students is 60.
2. (1)Since自从……以来(可作介词和连词),和现在完成时态连用。
He has lived here since he came. 自从他来到这里,就一直在这里住着。
(2)It is /has been+一段时间+since + 主语+一般过去时态+其他。自从做某事有多长时间了。在这个句型中如果从句的动作是终止性动词,则表示从动作开始到现在多长时间了;如果从句的动作是持续性动词,则表示从动作结束到现在多长时间了。
It is three years since he joined (终止性动词)the army.他参军有三年了;
It is five years since he lived(持续性动词)here. 他住在这儿有五年了。