传染性软疣的病原体是（）
A.HSV
B.VZV
C.HPV
D.MCV
E.柯萨奇病毒
参考答案：D
—Where did you find the professor who made the speech yesterday？
—It was in the hall ______ the students often have a meeting..
A．where
B．which
C．that
D．when
