It is ____ asking Tom for help, for he is always the last to help others.

“Boys and girls, I’m very glad to_____ you some difference between American English and British English today.” the speaker said.

This time last year I paid a visit______Shandong which is 5000 kilometers _____

a Chinese, I feel proud of my country and thecontributions _________have been made to the world culture

I don’t think Unit2 is more difficult. I think it’s _____.