北师大版六年级下册英语课本Unit 7 Lesson 4部分课后详细解答过程和答案

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Let's Practice部分详细解答过程和答案
You must neyer swim in the waterfall.
You must sleep inside your tent.
You must always wear a lifejacket in the water.
You mustn't go rock climbing alone.
You must turn off lights by midnight.
Read and Answer部分详细解答过程和答案
1.a.In the backyard.
b.In the afternoon.
c.To have fun.
2.a.throw,hit,catch
b.coach-our dad
c.fun