1 There was such a lot of traffic that he was late.
He was late because of much traffic.
2 We'll have to take a taxi because it's too far to walk.
It's such a long way to walk that we'll have to take a taxi.
3 Because there was ice on the runway, the plane's departure was delayed.
The plane's departure was delayed due to ice on the runway.
4 My sister married an American and moved to California.
My sister, who's married to an American moved to California.
5 The house had to be demolished because it was badly damaged in the storm.
Due to the fact that it was badly damaged in the storm.