Choose the correct past froms of the verbs to complete the sentences.

1. Sorry, I had/was having a shower when you called/were calling.
2. Did Lola stand/Was Lola standing outside when it started/was starting to rain?
3. When the car crashed/was crashing into us, we waited/were waiting at the traffic lights.
4. Fortunately we didn't ski/weren't skiing when the bad weather came/was coming.