I. Fill in each blank with can, can't, could or couldn't
1. Robots now ______ help astronauts perform very difficult tasks.
2. ____ robots recogzine our voices five years ago?
3. I read the book three times, but I ______ understand it.
4. I ____ remember his name. Do you know it?
5. Ten years ago, my grandpa _____ ride a horse, but now he can't.
6. Our daughter ___ read until she was seven years old?
7. Sorry, I ___ help you. I must do my homework!
8. Mozart ____ play the piano when he was only five years old.
9. We ___ buy any bread because the baker's was closed.
10. Jeanny ___ help you plant vegetables. She knows a lot of about gardening.
II. Put the words in the correct order to make sentences.
1. understand/not/she/anything/said/I/could
=> _________________________
2. the/could/years/house/robots/ten/ago/clean?
=> _________________________
3. was/very/I/couldn't/this/heavy/it/suitcase/so/lift
=> _________________________
III. Complete the sentences with correct from of will be or will be able to.
1. You _____ speak perfect English very soon.
2. Sorry, I ____ to see you tomorrow. I'll be very busy.
3. If you don't study your mathematics, you ____ do the exercises.
4. I think Jane ____ make the cake if she has all the ingredient.
5. Irene _____ play in the match on Saturday because she is ill.
6. I ____ swim sometimes in the future as long as I take swimming lessons.
7. ___ she ___ take part in the festival tomorrow?
8. Are you sure you _____ carry those heavy bags on your own?
9. What ___ you ___ cook for the party?
10. I'm afriad I ____ attend the meeting. I'm on business in Japan.
