I became a student ten years________. I have been a student _________1996. I have studied here ________ about 10 years.

___________you try to do something beyond what you have already mastered, you will never grow

People in Southwest China have never experienced _____ natural disaster． —Exactly．Let’s do our bit to help them．

The little boy ___ his hiding place when coughed.

He didn’t want to tell his parents that he was going home because he wanted to give them a .