几个语法题,请说明原因,加分1.ThepressurecausesAmericanstobeenergetic,butitalsoputsthemunderaconstantemotionalstrain.AcompetingBtocompete2.HewillagreetodowhatyourequirehimATOBFORCof3.Theyaskedmeto

Question

几个语法题,请说明原因,加分
1.The pressure ___causes Americans to be energetic,but it also puts them under a constant emotional strain.
A competing
B to compete
2.He will agree to do what you require___him
A TO
B FOR
C of
3.They asked me to have a drink with them.I said that it was at least ten years since I ___a good drink.
A had enjoyed
B having been enjoying
C have enjoyed
为什么用过去完成时?
4.____evidence that language-acquiring ability must be stimulated.
A It being
B It is
C There is
D There being
请问BCD什么区别?
5.This crop has similar qualities to the previous one,____both wind-resistant and adapted to the same type of soil.
A being
B been
C to be
D having been
请告知详细原因,我会加很多分的

Answer 1

1.选B
竞争的压力,竞争表示目的,所以用to compete
2.选C
require something of sombody 对某人有要求
3.选A
因为好好喝酒这一动作距离said都已经10年了,said这一动作已经是过去,喝酒就是过去的过去,所以用过去完成时.
4.选C
整个是同位语从句.
there is evidence是一个句子,意为有证据.evidence后面的句子又是它的同位语,解释evidence表示的具体内容.It being和there being填入句中,就没有了谓语动词.不能用it is,读不通.
5.选A
前半句是一个完整的句子,后面没有连接词and连接,说明只是一个状态,只要用be的现在分词being表伴随就可以,to be 表目的,这里也不需要用完成时.