Rewrite the following sentences: We're never been to alaska before (it's)

rewrite the following sentences
1 we're never been to alaska before(it's)
2 tom plans to open a new restaurant in London next month(is)
3 The last time Phong visited his hometown was 5 years old(that)
4 the early train is scheduled to arrive in London at 10 o'clock(arrives)
5 it's the most beautiful waterfall I've ever seen(such)