Choose the correct alternatives to complete the sentences.
1 I didn't watch/wasn't watching scary films when I was
a child.
2 We arrived/were arriving at the theatre at 6.30.
3 I tried/was trying to write a story for our English class
when you phoned me last night.
4 He bought/was buying that new computer game last
Saturday. He's playing it now.
5 Tread/was reading a good book before you arrived. It
was really interesting.