. — At present we students have access to many valuable English websites to learn English.
— As far as I know, English on line. is a free site visitors can not only learn the English language but also chat on line.
A. where
B. which
C. that
D. what
网友回答
(答案→)A. where
B. which
C. that
D. what
解析：可联系答.案.网客服索取。