1) 1. She can't see anything without her glasses.

2. She was so tired after the race that she couldn't stand up.

3. Last year Robert could beat his younger brother at chess.

4. They can see the whole of the city.

2) 1. After waiting for a long time, we were managed to go into the museum.

2. They weren't able to buy a new carpet yesterday.

3. I was managed to eat three plates of pasta in the restaurant last night!

4. Our friends will be able to visit us tomorrow afternoon.

5. She will be able to have a long holiday next year.

3) 1. Last year Mark could type 15 words per minute. Now he can type 30 words per minute.  

2. Last year Anne could speak only a little French. Now she can speak French quite well.

3. At the moment Carol cooks quite well, and if she works hard, perhaps she will be able to work as a chef.

4. Last year Tom could only play the piano. Now he can play the piano and the violin, and if he studies hard, perhaps he will be able to be a professional musician.

5. Last year Susan could ride a bike. Now she can drive a car, and she hopes that one day she will be able to drive a racing car.