2011年北京卷高考题 几道单选题求解析!谢谢、21．Experiments of this kind in both.21．Experiments of this kind in both the U.S.and Europe well before the Second World War.A．have conducted \x09B．have been conductedC．had conducte

2011年北京卷高考题 几道单选题求解析!谢谢、21．Experiments of this kind in both.21．Experiments of this kind in both the U.S.and Europe well before the Second World War.A．have conducted \x09B．have been conductedC．had conducte
2011年北京卷高考题 几道单选题求解析!谢谢、21．Experiments of this kind in both.
21．Experiments of this kind in both the U.S.and Europe well before the Second World War.
A．have conducted \x09B．have been conducted
C．had conducted \x09D．had been conducted
为什么用“had”而不用“have” 仅仅是因为是过去的事情么?
为什么有“been”?
22． Barbara Jones offers to her fans is honesty and happiness.
A．Which \x09B．What \x09C．That \x09D．Whom
为什么要用“what”,
30．Maybe if I science,and not literature then,I would be able to give you more help.
A．studied \x09B．would study\x09C．had studied \x09D．was studying
这不是主将从现么?那又是什么?为什么不选B?
34．The employment rate has continued to rise in big cities thanks to the efforts of the local governments to increase .
A．them\x09B．those \x09 C．it \x09D．that
彻底没懂、句意?指代?
以上几道高考题,3q

2011年北京卷高考题 几道单选题求解析!谢谢、21．Experiments of this kind in both.21．Experiments of this kind in both the U.S.and Europe well before the Second World War.A．have conducted \x09B．have been conductedC．had conducte
楼主你刚上高二还是高一?高中还有很多语法你没学呢
21.后面有二次大战（过去发生的事情） 又因为有before 前面的动作是过去的过去要用过去完成时 been是因为实验被实施为被动
22.主语从句 is前面那一堆都做主语 而且句子缺成分所以用what
巴巴拉琼斯给她的粉丝带来的是幸福和诚实
23.虚拟语气：如果我学的是科学,而不是文学,那么我也许能帮助你.【但显然这是不可能发生的 主将从现if是指有可能发生的】
虚拟语气的用法是从句的谓语动词要在主句的谓语动词的基础下往后退一个时态.即如果句子主句是一般式,那么从句就要用过去式.
在这个句子中,主句I would be give you more help用的是过去时,所以这里的从句Maybe if I___sicence 就要用过去完成时
24.代词it的用法. it代指前面交代过的“the employment rate”,是单数,而them和those是复数.因此选C
多亏了当地政府的努力,就业率在大城市持续上升