Modal verbs (ability and permission)

I ______ understand the chapter we had to read for homework. It was so difficult.

She's seven years old, but she _______ read yet. Her parents are getting her extra lessons.

I _______ drive a car until I was 34. Then I moved to the countryside, so I had to learn..

I ____ lift this box - it's too heavy! Would you help me?

My grandmother _______ use a computer until last month. Since then she's been taking lessons at the library.

Maybe the Smiths ___________ buy a new house next year.

Julian _______ play excellent golf when he was only ten.

Unfortunately, I really _______ sing at all. No-one in my family is musical either..

John _______ play tennis really well. He's champion of his club.

I looked everywhere for my glasses but I _______ find them anywhere.

I searched for your house for ages. luckily I _______ find it in the end.