Hong Kong returned to the motherland ________ July 1st, 1997.A. on B. in C. at
My best friend Jack looks happy, and he always ________ a smile ________ his face.
- I'm worried about my English.-_______ harder, _______ you will catch up with your classmates.
-_______, Judy. Let's go to the cinema!- I'm sorry I can't go with you. I have a lot of homework to do.
He has poor eyesight _ too much computer work at night.
- Don't keep water running when you wash hands.-_______.