Mary and Joy are ____ Class One. They are ____ the USA.A. from; in B. in; fromC. to; from D. in; to
Stop ______ about the traffic. Just think about what we can do to improve it.
I can't connect my computer to the Interrnet. There must be ______ wrong with it.
Mr. Li asks the students ______ in the river, because it’s too dangerous.
interesting subjects they are !
To live a green life, we should try to save ____ energy and produce__pollution.