题目

－Tom is so worried about the test that he plans to study all night. －Tell him he should quit __________ and get some sleep. A．worry       B．from worrying  C．worrying  D．to worry 答案：C13．Charles entered New York University in 2009 and one year later        to University of London as an exchange student（　　）A．sentB．had sentC．was sentD．had been sent