Let's Practice部分答案
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