—You look worried. What's your________?—I have trouble learning English.
---Excuse me .Can you give me ________about learning English ? ---Certainly .I’m glad to help you.
We often plant _______trees every year.
We can see __sun in the day, and we can see ___many stars at night.
—Could you tell me ? —I’m confident and creative.
I’m that I can’t go to the movie with you tonight, for I have lots of work to do.