Ⅰ.阅读课文，判断正误
1．It already snowed in Tibet when they took a trip in Tibet in autumn.( )
2．They became snowmen riding bicycles because they were tired and it was cold.( )
3．The lakes shone like glass in the rising sun and looked wonderful.( )
4．They had a good view in surprise when they climbed up the mountain.( )
5．When they went down the hill，they felt warmer and had to change heavy clothes for Tshirts and shorts.( )
6．The author had to stay awake while the others went to sleep in their tent，because he had to think about how far they had already travelled.( )
