gwd_15_17

missgmat

Q17:

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.

 

1. Galileo did not invent the telescope, but on hearing, in 1609, that such an optical instrument had been made, he
2. Galileo had not invented the telescope, but when he heard, in 1609, of such an optical instrument having been made,
3. Galileo, even though he had not invented the telescope, on hearing, in 1609, that such an optical instrument had been made, he
4. Even though Galileo did not invent the telescope, on hearing, in 1609, that such an optical instrument had been made,
5. Even though Galileo did not invent the telescope, but when he heard, 1609, of such an optical instrument being made, he

why choose A?

Fisherman

Other options are all wrong except answer A. Which option confused you?

B. No subject for the second sentence
C. Clearly wrong, double subjects for the first sentence
D. No subject for the second sentence
E. being made is wrong