把下列句子翻译宾语从句（SOS，好的我加分，急啊）

1.当时我们真的不知道那消息是否是真的
At that time we really didn't know if/whether the news was true.
2.他说他三年前去过一次香港
He said he had been to Hongkong once three years before.
3.她问他能否后天离开广州
She asked if/whether he could leave Guangzhou intwo days' time/the day after tomorrow.
4.Peter说澳大利亚比美国小
Peter said Australia is smaller than America.
5.你能否告诉我们她何时回来
Could you tell me when she would come back.
6.他们认为他们不可能通过考试
They thought they could not pass the exam.
7.他说他头痛而且咳嗽
He said he had a headache and cough.
8.你能告诉我火车什么时候开吗？
Could you tell me when the train will start/leave?

祝你进步！

1,we really didn't know whether the news was true or not at that time.
2,He said that he had gone to HongKong three years ago.
3,She asked him whether he could leave Guangzhou the day after tomorrow.
4,Peter said Austalia was smaller than America.
5,Can you tell us when she comes?
6,They didn'