----- It’s smoggy(多雾的) these days in Beijing city. That’s terrible!----- Yes, I hope to plant trees.________ trees, ______air pollution.
—How long have Mr.and Mrs.Smith________? —For more than twenty years.
根据汉语意思翻译句子。 所有的票都已经被卖光了。 All the tickets have been________ ________ ________.
—English isn’t as________as Chinese. —Maybe,perhaps it’s just because Chinese is your native language.
—There is something wrong with my foot.Dad,could you please________? —No problem.
—Always look around________you cross the street,David. —OK,I know,Mom. A.until B.before C.unless