Choose the correct options

1. The pizza [was bake|was baked] last night.
2. The concert tickets [were sold|was sold] online.
3. The New Year's decorations [were took|were taken] down yesterday.
4. The letters [were written|was write] by Helen.
5. The shopping mall [build|was built] ten years ago.
6. The new bird species [discover|was discovered] last summer in the Amazon rainforest.
7. The team's song [was sung|was sang] at the start of the match.
8. The fashion collection [design|was designed] last year.
9. The ancient artifact [discovered|was discovered] during the excavation.
10. Many useful things [were invented|was invent] in the 20th century.