The Glass House Mountains in Queensland,Australia,were sighted in 1770 by the English navigator Captain Tomes Cook,(by whom they were named supposedly because its) sheer wet rocks glistened like glass.
替换括号里的,其中C选项:naming them supposedly since their 不知道为什么不对 解释说什么介词什么的没看明白 还有说since不合适,也不太理解 谢谢大家了