Putting on a happy face not only helps us make friends but also makes us feel better —- _______

When did your brother begin to show hisinterest in medicine.—It was a Saturday _____ he noticed hisclassmate experimenting on a frog in the lab.

Can you see the baskets on the table—Oh, yes. Look! There are some eggs in .

My uncle is easy to get angry. He may have _________ yang.

I didn’t find his office. If only I______his address!