几个小问题，嘻嘻。

According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.
(A) minority graduates are nearly four times more likely than are other graduates in planning to practice
(B) minority graduates are nearly four times more likely than other graduates who plan on practicing
(C) minority graduates are nearly four times as likely as other graduates to plan on practicing
(D) it is nearly four times more likely that minority graduates rather than other graduates will plan to practice
(E) it is nearly four times as likely for minority graduates than other graduates to plan to practice

答案是C，但是我不明白，这话什么意思？是说少数民族的学生比其他学生4倍的更倾向于去plan on practicing?

likely是个adv，怎么能用“4倍于”这种东西衡量呢？

另外，如果B把“other graduates who plan on practicing”改成“other graduates to plan on practicing”是不是也正确？

At the time of the Mexican agrarian revolution, the most radical faction, that of Zapata and his followers, proposed a return to communal ownership of land, to what had been a pre-Columbian form of ownership respected by the Spaniards.
(A) land, to what had been a pre-Columbian form of ownership respected by the Spaniards
(B) land, a form of ownership of the pre-Columbians and respected by the Spaniards
(C) land, respected by the Spaniards and a pre-Columbian form of ownership
(D) land in which a pre-Columbian form of ownership was respected by the Spaniards
(E) land that had been a pre-Columbian form of ownership respected by the Spaniards

答案是A。这个我选错了。

to what中的to是return to的to吗？也就是说，这是个同位语从句？

Biologists believe that they have found one of the substances that tell individual genes both when to become active and when to remain quiescent in the earliest phases of an embryo’s development.
(A) tell individual genes both when to become active and when to remain
(B) tell individual genes both at which time they should become active or should remain
(C) tells individual genes both when to become active or remain
(D) tells individual genes both when to become active or when to remain
(E) will tell an individual gene both about when it should become active and remain

答案是A，但是为什么是用“tell”呢？是强制指代substances吗？
还是说，one of 一个复数名词，后面的动词就要用复数形式？

都是大全里的题，可是没找到讨论，很简单，大家帮忙小小回答一下吧，谢谢

555，叶子mm你帮我回答一下嘛。

这几个题分别是大全987里的40，153和179，

我在版面上搜了，没搜到，在讨论区里找了也没找到，

谢谢了。

According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.
(A) minority graduates are nearly four times more likely than are other graduates in planning to practice
(B) minority graduates are nearly four times more likely than other graduates who plan on practicing
(C) minority graduates are nearly four times as likely as other graduates to plan on practicing
(D) it is nearly four times more likely that minority graduates rather than other graduates will plan to practice
(E) it is nearly four times as likely for minority graduates than other graduates to plan to practice

答案是C，但是我不明白，这话什么意思？是说少数民族的学生比其他学生4倍的更倾向于去plan on practicing?

likely是个adv，怎么能用“4倍于”这种东西衡量呢？

这题偶好像选的A, 1)plan to do 和plan on doing 意思不同.

                           2)觉得A平衡好些.

                           3)more likely than ,as likely as 都是 对的.

另外，如果B把“other graduates who plan on practicing”改成“other graduates to plan on practicing”是不是也正确？

At the time of the Mexican agrarian revolution, the most radical faction, that of Zapata and his followers, proposed a return to communal ownership of land, to what had been a pre-Columbian form of ownership respected by the Spaniards.
(A) land, to what had been a pre-Columbian form of ownership respected by the Spaniards
(B) land, a form of ownership of the pre-Columbians and respected by the Spaniards
(C) land, respected by the Spaniards and a pre-Columbian form of ownership
(D) land in which a pre-Columbian form of ownership was respected by the Spaniards
(E) land that had been a pre-Columbian form of ownership respected by the Spaniards

答案是A。这个我选错了。

to what中的to是return to的to吗？也就是说，这是个同位语从句？

153题,偶感觉to 是 respect ... to 的提前.

Biologists believe that they have found one of the substances that tell individual genes both when to become active and when to remain quiescent in the earliest phases of an embryo’s development.
(A) tell individual genes both when to become active and when to remain
(B) tell individual genes both at which time they should become active or should remain
(C) tells individual genes both when to become active or remain
(D) tells individual genes both when to become active or when to remain
(E) will tell an individual gene both about when it should become active and remain

答案是A，但是为什么是用“tell”呢？是强制指代substances吗？
还是说，one of 一个复数名词，后面的动词就要用复数形式？

都是大全里的题，可是没找到讨论，很简单，大家帮忙小小回答一下吧，谢谢

179   that从句是修饰substances的,所以用tell,