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题库 / Prep2007E2-SC-107
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.
Galileo did not invent the telescope, but on hearing, in 1609, that such an optical instrument had been made, he
Galileo had not invented the telescope, but when he heard, in 1609, of such an optical instrument having been made,
Galileo, even though he had not invented the telescope, on hearing, in 1609, that such an optical instrument had been made, he
Even though Galileo did not invent the telescope, on hearing, in 1609, that such an optical instrument had been made,
Even though Galileo did not invent the telescope, but when he heard, in 1609, of such an optical instrument being made, he
错选b
看后半段可以排除b，when he heard of such an optical instrument having been made, 这里不对
前后都要看用来排除
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