题目内容
(选词填空，补全对话)
saw, when, an, were, into, did, were, what, do, UFO
A: 1 happened yesterday?
B: A UFO landed on Center Street.
A: What 2 you doing when the UFO landed?
B: I was playing in Center Street 3 it landed.
A: 4 you see the UFO?
B: Yes, I did.
A: Did you see 5 alien?
B: Yes. I 6 an alien coming out of the 7 .
A: 8 you scared?
B: Not really.
A: What did the alien 9 ?
B: He walked down the street and then went 10 a store.
答案：
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