1. ___ you ski well now?
2. ___ you ___ could to visit us in a week?
3. ___ they clean their flat yesterday?
4. ___ he help me to solve this problem?
5. ___ Polly ___ to draw such a picture?
6. ___ he play chess last year?
7. ___ you surf well?
8. ___ Kate knit a doll's dress last week?
9. ___ she ___ to take part in this festival tomorrow?
10. ___ you win this competition yesterday?
11. __ Dan ride his motorbike well?
12. ___ Liz draw pictures when she was two?
13. ___ Bob ___ to hold the conference next month?

1. Can you ski well now?
To answer this question, I would need to ask the student if they can ski well or not. If they answer yes, then the correct answer would be "Can". If they answer no, then the correct answer would be "Can't".

2. Could you come to visit us in a week?
To answer this question, I would need to ask the student if they can visit in a week or not. If they answer yes, then the correct answer would be "Could". If they answer no, then the correct answer would be "Couldn't".

3. Did they clean their flat yesterday?
To answer this question, I would need to ask the student if they cleaned their flat or not. If they answer yes, then the correct answer would be "Did". If they answer no, then the correct answer would be "Didn't".

4. Can he help me to solve this problem?
To answer this question, I would need to ask the student if he can help to solve the problem or not. If they answer yes, then the correct answer would be "Can". If they answer no, then the correct answer would be "Can't".

5. Could Polly draw such a picture?
To answer this question, I would need to ask the student if Polly could draw such a picture or not. If they answer yes, then the correct answer would be "Could". If they answer no, then the correct answer would be "Couldn't".

6. Did he play chess last year?
To answer this question, I would need to ask the student if he played chess last year or not. If they answer yes, then the correct answer would be "Did". If they answer no, then the correct answer would be "Didn't".

7. Can you surf well?
To answer this question, I would need to ask the student if they can surf well or not. If they answer yes, then the correct answer would be "Can". If they answer no, then the correct answer would be "Can't".

8. Did Kate knit a doll's dress last week?
To answer this question, I would need to ask the student if Kate knit a doll's dress last week or not. If they answer yes, then the correct answer would be "Did". If they answer no, then the correct answer would be "Didn't".

9. Is she going to take part in this festival tomorrow?
To answer this question, I would need to ask the student if she is going to take part in the festival tomorrow or not. If they answer yes, then the correct answer would be "Is". If they answer no, then the correct answer would be "Isn't".

10. Did you win this competition yesterday?
To answer this question, I would need to ask the student if they won the competition yesterday or not. If they answer yes, then the correct answer would be "Did". If they answer no, then the correct answer would be "Didn't".

11. Can Dan ride his motorbike well?
To answer this question, I would need to ask the student if Dan can ride his motorbike well or not. If they answer yes, then the correct answer would be "Can". If they answer no, then the correct answer would be "Can't".

12. Could Liz draw pictures when she was two?
To answer this question, I would need to ask the student if Liz could draw pictures when she was two or not. If they answer yes, then the correct answer would be "Could". If they answer no, then the correct answer would be "Couldn't".

13. Is Bob going to hold the conference next month?
To answer this question, I would need to ask the student if Bob is going to hold the conference next month or not. If they answer yes, then the correct answer would be "Is". If they answer no, then the correct answer would be "Isn't".