There are many volunteers _________ are helping the children in Sichuan.
_______haveyoulearnedtoplaytheguitar?—Forthreeyears.[ ]
I hear a foreigner will come to our school. Do you know him ?—Yes, Edward, university student from Europe, will teach us art in his spare time.
Who are you talking _____?—Mrs. Sun. She is very ill.[ ]
He didn’t work ________ the other students in his class, so he got the worst report card for the end-of-year exams.