在一个圆筒内垂直地放了两个平面镜M₁和M₂（如图）．一束入射光射入筒内，经两平面镜反射后又从筒内反射出去．出射光与入射光的位置关系是______

A．互相平行    B．相交，交角小于90°    C．相交，交角大于90°    D．不在同一平面内．

填入一个适当的词补全对话,每空一词。

A: When did you get back, Anee?

B: Last night.

A:  1  was the flight(空中旅行)?

B: Very boring.  It was too    2  .  Fourteen hours!

A: What were the hotel like?

B: They were fine.  I had a nice big room.  I liked that....

A: What about the   3  ?

B: Well, it wasn't good.  I am   4  . It rained almost every day.

A: Oh, that's a shame.

B: But the people I met were very nice.     5was very helpful.

1. _________2. _________3. _________4. _________5. _________