这两天做Prep的请教

jason1985716

1. Galileo did not invent the telescope, but on hearing, in 1609, that such an optical instrument had
been made, he quickly built his own device from an organ pipe and spectacle lenses.          

(A) Galileo did not invent the telescope, but on hearing, in 1609, that such an optical instrument had
been made, he
(B) Galileo had not invented the telescope, but when he heard, in 1609, of such an optical
instrument having been made,
(C) Galileo, even though he had not invented the telescope, on hearing, in 1609, that such an
optical instrument had been made, he
(D) Even though Galileo did not invent the telescope, on hearing, in 1609, that such an optical
instrument had been made,
(E) Even though Galileo did not invent the telescope, but when he heard, in 1609, of such an optical
instrument being made, he  

这道题关于C选项，除了多出一个主语，我想知道用逗号隔开的这么多个部分分别作什么成分啊？

2. Some patients who do not respond to therapies for depression may simply have received
inadequate treatment, having, for example, been prescribed a drug at a dosage too low to be
effective or having been taken off a drug too soon.

(A) having, for example, been prescribed a drug at a dosage too low to be effective or having been
(B) having, for example, a drug prescription that was ineffective because the dosage was too low,
or being
(C) as, for example, having too low of a dosage of a prescribed drug for it to be effective, or being
(D) when they have, for example, been prescribed too low a drug dosage to be effective, or were
(E) for example, when they have a drug prescription with a dosage too low to be effective, or been

这道题正确选项A中的having难道不错吗？不是说完成式不能用成分词形式吗？请求指点

3. 再问个关于介词搭配的问题：A of B and C有可能是A of B和C平行，也有可能是A of B and (of) C对不对?  而A and B of C这种情况的话，A永远共用不了of 对不对？

在线等解答，谢谢。

jason1985716

没人理，自己顶一下！！

jason1985716

再顶！

lisalisalisa

 on hearing, cha ru yv--pin yin

in 1609--shi jian zhuang yv--pin yin

lisalisalisa

2,

having+ done---, subject+verb+object. means having done happen before verb.

For example, Having read this book, I don't want to read it again.

having read happened before don't want to read.

lisalisalisa

3. 再问个关于介词搭配的问题：A of B and C有可能是A of B和C平行，也有可能是A of B and (of) C对不对?  而A and B of C这种情况的话，A永远共用不了of 对不对？

在线等解答，谢谢

please, give me an example.

jason1985716

oh,i see! thx

smartsky11

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