Can / Can't

___________ to work today because I'm sick. (I / go)

Excuse me, where _________ a bus ticket? (I / buy)

___________ me with my homework? (you / help)

_____________ but they can swim very well. (Penguins / fly)

_________ he said that! He is a terrible person! (I / believe)

____________ us tomorrow at three o'clock. We'll meet him in the library. (Henry / meet)

_____________ the time in a clock. He only understands digital watches. (My brother / tell)

_____________ that bird? That's a very rare species. (you / see)

__________ the window for a bit? It's too hot outside. (you / open)

_____________, but he can ride a bicycle. (My friend / drive)