You’d better wear a pair of comfortable trainers when ________a long walk.
It’s time for class. Let’s stop . Look! The teacher decides us something important.
—How far is it from the post office to the bank?—It’s about .
You are very good speaking English. Can you help me it?
There are usually 28 in a person’s mouth, so we should listen to the doctor’s ______ to protect(保护)them.
—Can you come to dinner with us this evening, Zhao Ming? — _______.