—How does Jack usually go to school?

—He ______ ride a bike, but now he ______ there to lose weight. [ ]

A. used to, is used to walk

B. was used to, is used to walking

C. was used to, is used to walk

D. used to, is used to walking

旅游企业讲信誉的最基本要求是（）。

A．主动招呼客人，为客人着想

B．按质论价，收费合理

C．明码标价，公正公开

D．清洁端庄，礼貌待人