— Mum, I'm shy. I can't sing ____ so many people.

Look at this picture. The boy is Ben. He is a big tree. What can you see in the tree? There are some birds in the tree. They're singing happily. There is a table in the picture. You can see two pears the table. There are two balls under the table. There is a model plane the two balls. A chair is the table. There is a cat the basket. There is a dog the tree, so you can't see it.

选词填空（语篇）困难