P17-18

I. 略

II. triangle, square, rectangle, round/circle

III. 1-5BCBCC 6-10AABCA 11-14ABCA

IV. 1-5BBBCB 6-10BBCAB

V. Name

P19-20

I. 略

II. 1. see, sea 2. their, there 3. right

, write 4. no, know 5. sun, son 6. hear, here 7. I, eye

8. for, four

III. B-A-D-F-E-C

2—3—4—1

IV. 略

V. 略

P21-22

I. 1-5 ehabc 6-10 gifjd

II. 1. He is playing tennis. Yes, I do. 2. They are playing hockey. No, I don’t.

III. 略

IV. twelve, January, second, of, Spring Festival, third, on, fourth, on, May, it, it, June, June, sixth, seventh, September 10th, on, October, eleventh, December, twelfth, Christmas