Don’t _____ so often. It’s bad for your health.—I have to. But I know I should have enough sleep.

At the meeting place of the Yangtze River and Jialing RIiver ,one of the largest cities in china.

Did you him my QQ number? -No, I didn’t.

I’ll return the book to Mary, but I can’t find her anywhere.—She ______ the teacher’s office. You can find her there.

Some organizations have been__________ to help the poor students in the western areas of China.