1 . I usually read books while ............ a train
A. on b . over c . in d. at
2 . At 8 pm tomorrow , we ( play ) ............... tennis together
3 . Solar energy ( use ) ....... by many countries in the world in the future
4. I ( not / come ) ......... home for luch because i am planning to ear out with my friends .
5 . Why should we save energy ? ...................................................................
6 . Which transport do you want to travel in the future ? ......................................
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