开始前, 我对学生讲“Now, let’s welcome Santa Claus to come to our class.Look, he has a big box.There are many nice presents in it.If who can guess the right things he’ll give it to you as a present.”在这种情景下, 学生为了得到自己喜欢的礼物, 就会不断提出Is there…in the box...