两个多边形相似的条件是（　　）

________ Tom ________ Mary speaks good Chinese, so they can communicate with these Chinese students very well.       

根据短文内容，完成下列句子，每空词数不限。
Tim: Mom!  Where are my shoes?
Mom: Are they under your bed?
Tim: No, they aren’t.
Mom: Are they behind the door?
Tim: Oh, yes. Here’s one shoe.
Mom: Let me see. Where is the other one?
Tim: Oh, my God!  It’s 7:50. It’s time for school!  I’m late.
Mom： Don’t worry, dear. Let me help you. Oh, look at the chair!
Tim:  It’s under the chair.The dog is playing with it.

用所给出的词语造句。

①盼望：

②忽然：