Don’t the people who are in trouble. We should be friendly to them.
The story is about Lei Feng.It's very ______.
—Which is______,the sun,the moon or the earth?—Of course,the moon is.
I bought ______ for my son,but ______ for myself.
—______ you in America in 1999?—Yes, I ____________.
—______ does your mother go for a walk? —Every afternoon.