We usually have our school trip a morning of April1st.
—I wonder _______. —By searching the Internet.
In China it is a custom to give kids lucky money, _______ during the Spring Festival.
People along the river didn’t allow them to ______ a factory so as not to pollute the water.
—The hazy weather has ________ for almost a week in North China. —Yes, and the government has tried to solve it.
_______ is an unhealthy life style.