Past Simple vs Continuous; modal verbs

I was walking home when I ____ (meet) an old friend.

What ______ (do) yesterday at 10 pm?

• was you doing

• were you doing

• do you do

They ______ (drive) very fast when the car hit a tree.

• was driving

• were driving

• drove

Where ______ (buy) this TV?

• did you bought

• did you buy

• were you buying

Hw cut his finger while he ______ (cook) dinner.

• were cooking

• cooked

• was cooking

While I ____ (wait) for the bus it suddenly started to rain.

• wait

• waiting

• was waiting

My sister ______ wear uniform at school.

• shouldn't

• have to

• has to

Chefs ______ follow recipes.

• have to

• shouldn't

• can

In class you ______ eat gum.

• Mustn´t

• should

• don't have to

We ______ use the phone in the school.

• Mustn´t

• Must

• could