modal verbs

It's possible it will rain today. It...... rain today.

You are not allowed to smoke here! You ..... smoke here!

If I were you , I'd go to the doctor. You ......go to a doctor.

I don't know where he is. He ...... be in the living room.

I'm sure this bag was expensive. This bag ............. expensive.

I'm sure it wasn't Tom you saw. It .......................Tom.

Why didn't you call me yesterday? You ..........................me!

I bought three bottles of water and it wasn't necessary because we have many bottles at home. I ....................... water.

Why are they not here? I don't know. They (get lost).

When Betsy was 3, she ......write and read.

• can

• could

• could have