会英语的帮帮忙,几道语法题,1THE radio of the work done by the machine______the work done on it is called the efficiency of the machine.A against B with C to D for2 Once more I have to leave Beijing,____I have been living for 8 years .A tha

会英语的帮帮忙,几道语法题,1THE radio of the work done by the machine______the work done on it is called the efficiency of the machine.A against B with C to D for2 Once more I have to leave Beijing,____I have been living for 8 years .A tha
会英语的帮帮忙,几道语法题,
1THE radio of the work done by the machine______the work done on it is called the efficiency of the machine.
A against B with C to D for
2 Once more I have to leave Beijing,____I have been living for 8 years .
A that B where Cwhich D as
3 I was almost alsleep when I suddenly heard someone_____at the door.
A be knoking B knocking C to knock D having knocked

会英语的帮帮忙,几道语法题,1THE radio of the work done by the machine______the work done on it is called the efficiency of the machine.A against B with C to D for2 Once more I have to leave Beijing,____I have been living for 8 years .A tha
1. C
题目应该是：The ratio...
固定短语：the raito of A to B,意思是“A对B的比率”即A/B.
2. B
将先行词Beijing代入该非限制性定语从句中,必须加上介词in Beijing一起做从句的地点状语,所以必须使用关系副词where.
即：where I have been living for 8 years
= in which I have been living for 8 years
= in Beijing I have been living for 8 years
= I have been living in Beijing for 8 years
3. B
翻译：我几乎要睡着了,就在这时我突然听到有人正在敲门.
考查“感官动词hear + 宾语someone + 宾语补足语”结构.
AD都不能用做宾语补足语,排除；
不定式如果做感官动词的宾语补足语,在主动句中必须省略不定式符合to,排除C.
B强调someone和knock的主动关系,且表明knock该动作当时正在发生.

1THE radio of the work done by the machine______the work done on it is called the efficiency of the machine.
A against
2 Once more I have to leave Beijing,____I have been living for 8 years ....

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1THE radio of the work done by the machine______the work done on it is called the efficiency of the machine.
A against
2 Once more I have to leave Beijing,____I have been living for 8 years .
B where 非限定语从句，从句中少了地点状语
3 I was almost alsleep when I suddenly heard someone_____at the door.
B knocking hear sb. doing sth. 听到某人正在做某事。

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第一题我不太确定，第二题选B，非限制性定语从句修饰Beijing，where作状语。
第三题B，考查非谓语动词，hear sb doing sth。