____ you please open the door, sir?

• CAN

• COULD

When I was a child, I ____ not swim.

• CAN

• COULD

When ___________ I talk to you about the company report?

• CAN

• COULD

I ___________ read without my reading glasses. Where are they?

• CAN'T

• COULDN'T

How many hot dogs ___________ you eat at one time?

• CAN

• COULD

Most dinosaurs walked on land, but some ___________ fly or even swim.

• CAN

• COULD

Douglas hit the tree because he ___________ stop his car.

• CAN'T

• COULDN'T

I ___________ drive a truck when I was only sixteen years old.

• CAN

• COULD

Excuse me, I ___________ hear you right now. The music is too loud.

• CAN'T

• COULDN'T

Ellie ___________ ride a bicycle. She rides it to school every day.

• CAN

• COULD