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.

等腰三角形两边长分别为4和8，则这个等腰三角形的周长为(   )

---It's everyone's duty to join the Clean Your Plate Compaign(光盘行动).

                        ---Sure, we should try to    all the food that we have ordered.