【正文】
s our duty to do what we can to make our city more beautiful. I believe if everyone makes an effort,Xining will be one of the most beautiful cities in our country. 。s more, we shouldn39。 t do . ____ ____ _ _ ___ __ _ ________ ______ ___ _________ ______ ___ _________ ____________ ______ ___ _________ ______ ___ _________ ____________ ______ ___ _________ ______ ___ _________ ____________ ______ ___ _________ ______ ___ _________ ___ I think we should take an active part in this activity. First, we are supposed to speak politely. We can say “Thank you”, “ Excuse me, … ? ” , or “Could you please… ? ” as often as possible. Then, we should cross the road when the traffic _________ ______ ___ _________ ______ ___ _________ ____________ ______ ___ _________ ______ ___ _________ ____________ ______ ___ _________ ______ ___ _________ ____________ ______ ___ _________ ______ ___ _________ __________