民国时期报纸字体:what do you use to open DAT files?

what do you use to open DAT files? What are you ??? to do What do you do to keep fit? What do you think of people who buy things they do not use?What about you? what are you prepare to do? 是 “what are you prepraing to do”是什么意思？ What ever do you want to do?正确吗 What do you want then to do?（翻译） What do you do to improve your English? what do you want me to do 的中文是什么意思？