Вставьте пропущенные артикли
1 I met a friend yesterday in the city centre.
2 Most important thing in life are good friends.
3 Experts say government is having problems.
4 When I’m bored I pick up book and read.
5 I like listening to actors and things they say
about life in Hollywood.
6 Programmes I watch are all on late at night

а в первом предложении правильно?

Да, оно уже с артиклями

а во остальных нет разве артикля " an . a"?

В предложениях многие существительные стоят во множественном числе , следовательно, артикль an/a не употребляется

THE most important thing in life are good friends. Experts say THE government is having problems. When I'm bored I pick up THE book and read.I like listening to THE actors and THE things they say about life in Hollywood. THE programmes I watch are all on late at night.