A：The rehearsal will start at 9 o'clock. There is still half an hour left.
A：The rehearsal will start at 9 o'clock. There is still half an hour left.
这个排练9点钟才开始，我们还有半小时无事可做。
A：The rehearsal will start at 9 o'clock. There is still half an hour left.
这个排练9点钟才开始，我们还有半小时无事可做。