选出每组中不同类的单词。 ( )(1)A. about B. of C. easy ( )(2)A. China B. Chinese C. Canada ( )(3)A. Beijing B. Canada C. Canberra ( )(4)A. Washington,D.C. B. the Palace Museum C. the White House
How long has he_______the job?
—_______ have you been studying English? —Since 2002.
It’s cold here. Please keep the window_________.
Simon heard his neighbor _________ for help at night.
An old friend of my sister’s always helps my brother and _________ with _________ lessons.