用适当的单词填空,完成下面对话,每空一词.

用适当的单词填空,完成下面对话,每空一词.
一个数字一个单词
A：yesterday i read a book.
B:what's it
A:ti's about a strang travel to mars.
B:do you think we can travel to mars?
A:of course,we can go there by ②.but i don't believe we can live there.
B:③do i.because the gravity on the surface of mars is not so ④as it is on earth.we can hardly stand still there.
A:what's ⑤,there is no water.
B:and sometimes it's very ⑥.the lowest ⑦can reach 140℃ below zero.
A:but maybe people can spend their holiday there in the⑧.
B:how ⑨will it take to go there by spaceship?
A:about eight months.
B：that's really a long way.i ⑩ i could fly to mars one day.that must be great fun.
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