Modals in the past

My mum _____ swim, when she was a child.

You ______ wash your hair every day. Twice a week is enough.

We ________ see the sea from the house where we stayed last summer.

My grandad ________ study Science at school.

Before the telephone was invented, people _________ write letters.

My brother didn't speak French but he ________ communicate with our guests in English.

My mum _______ drive until she was 35.

My English teacher was not very strict -- we ________ use our dictionaries in tests.

My cousins were away on holiday last week so they _________ come to my party.

The boy fell into the river but fortunately, he _______ reach the bank.