Английский язык. Помогите пожалуйста!

Ask a question to the underlined words.
1) He could phone me YESTERDAY.
2) We were AT THE CINEMA yesterday.
3) MY FRIEND was at home last weekend.
4) Tom could play football WHEN HE WAS 5 YEARS OLD.
5) Children could WRITE the test well.

Задание:
"Задайте вопрос на подчеркнутые слова. "(У меня выделенные большими буквами).