Unit 9 Staying Healthy

lesson four       重点短语：  1. drink a lot of milk  喝牛奶  2. a lot of exercise  很多练习  3. a lot of fruit  很多水果  4. a lot of vegetables  很多蔬菜  5. a good idea  好主意 【典型例题】一. 单项选择（   ）1.we ought to have a good ________ habit.    a. eat       b. eating       c. eats（   ）2.we shouldn’t ________ the animals when we are in the zoo.    a. throw stones to     b. throw stones at      c. threw stones at （   ）3.our p.e. teacher told us ________ the ball and play together as a team.    a. keep passing   b. to keep on passing  c. to