3. Fill in each blank with can , can't, could or couldn't:
1. Robots now....... help astronauts perform very difficult tasks.
2. ........ robots recognise 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. 10 years ago my grandpa ..... ride a horse, but now he can't
6. Our daughter .... read until she was 7 years old.
7. Sorry, I..... help you. I must do my homework!
8. Mozart ....... play the piano when he was only 5 years old
9. We ............ buy any bread because the baker's was closed
10. Jeanny ........... help you plant vegetables. She knows a lot about gardening.
1 Can
2 could
3 can't
4 can't
5 could
6 couldn't
7 can't
8 could
9 couldn't
10 can