July 21

1. two pieces of advice

2. teachers' children

3. Jane's and Mary's bikes

4. a friend of his

5. a friend of the teacher's

6. two women doctors

7. three deer

8. the cover of the book

9. two wolves

10.art works

11.a four hours' speech

a four-hour speech

四：

1. be different from

2. charge for

3. search for

4. name after

5. in person 亲自

6. on purpose 故意

7. object to do sth.

8. look after = take care of 照顾、照料

9. get along (well) with sb.

10.rely on