用 because, because of, as 或 since 完成对话。

Rob: Have any aliens ever visited the earth?

Nancy: I believe the aliens have visited the Earth some people have met aliens.

Jimmy: Why do you believe that?

we know, not all stories about aliens are true— many are hoaxes (骗局, 谣言).

Nancy: I do believe it is true the

evidence (证据）that people provide just like the UFO. Rob: Well, I believe aliens haven't visited the Earth. Nancy: What's your reason?

Rob: you want to know the reason, let me tell you the main reason for it. Some of the evidence of aliens is not real, just people like imagining things.

Jimmy: I agree with you.