The old man is a good swimmer,and even now he often swims ________ Tuojiang River after supper.
Do you go to school ______ bike or _____ foot?
—How long did it ________him to get to the hospital?
Well, I have ________to tell you. Please keep quiet.
Eating a ________diet helps us to keep a _________of yin and yang.
This school is different ________ others. It has many out-of-class activities.