(一):The tour will take about an hour and a half. 这次参观大概需要一个半小时。

A: The tour will take about an hour and a half.
甲：这次参观大概需要一个半小时。
B: That's OK.
乙：好的。
The tour should last about an hour and a half.
这次参观大概会持续一个半小时。
It will take me several hours if I really look at everything.
假如我全部参观的话，那需要好几个小时。

(二):If you are ready, ladies and gentlemen? 准备好了吗，女士们先生们？

A: If you are ready, ladies and gentlemen?
甲：准备好了吗，女士们先生们？
B: Everything is OK.
乙：一切都就绪了。

Are you ready now?

Is everything ready?

Are you all set?