回答如下：

1. eleven

2. twelve

3. thirteen

4. fourteen

5. fifteen

6. sixteen

7. seventeen

8. eighteen

9. nineteen

10. twenty

Tips:

1. Practice regularly and repeatedly.

2. Use mnemonics to help remember the words, like creating an image in your mind or associating them with something else.

3. Write the words down multiple times.

4. Say the words out loud as you write them.

5. Test yourself frequently.