1. UNIT 22

2. LESSON 85

3. variety n. (vary v. /various adj.)  This is one well-known variety.  At school we learn a variety of things.  They have developed new varieties of wheat.  The weather varies from day to day.  Various teaching methods have been brought in.

4. many different varieties of bee(s) the different types of bee  This kind of film(s) is popular.  These kinds of film(s) are popular.  Films of this kind are popular.

5. work with bees experiment with bees

6. To find out, Von Frish built special hives,each only with one honey- comb.

7. to tell the bees apart to tell A from B to tell the difference between

8. troop n. ( 一 ) 群 ; ( 一 ) 队 ; ( 复数 ) 军队 v. 结队而行；成群涌向  a troop of young pioneers/visitors  The enemy troops have been driven out of the country.  The students trooped behind the teacher into the classroom.

9. copy v. 抄写 ; 复制 模仿 ; 仿效  He is copying some important papers.  Please copy my actions.(=Please act as I do.)

10. mark the bee red mark the bees with coloured spots

11. LESSON 86

12. Another question came up.  His question came up at the meeting.

13. coworker cooperate (cooperation/co-operation)

14. watch sth. closely come close to sb.

15. Another fact came to light. =Another fact was discovered.  New facts about the ancient Egypt have recently come to light.  The family were so pleased when the long- lost jewels came to light.

16. A marked bee fed itself from the dish.

17. The dancer headed straight upward.  We are heading toward the mountain village.  The ship is heading for London for repairs.

18. make a beeline for …  He made a beeline for the door.