Be careful! You might fall into the water.–Thank you. I____.I______ so close to the pool.

_______ the teachers in their school is about 200 and one fourth of them are _______ teachers.

I can’t find him. What should I do—Maybe you should ____.

They practise on the playground. They have fun together.

I’m green at everything.—Don’t worry. ______ you get older，you will get more experience.