What were you up to when your parents came in?— I＿＿for a while and＿＿some reading.A.was playing； was going to do B.played； did C.had played； was going to do D.had played； did为什么选c不选d啊?

what you up to what you up to WHAT ARE YOU UP TO what are you up to? what are you up to What are you up to? What do you up to what are you up what have you been up to What have you been up to lately? what have you been up to?中文翻译 ..What you've been up to? What have you been up to? what have you guys been up to? what have you been up to lately? what have you been up to? WHAT ARE YOU UP TO中文是什么意思? what you up to?怎么翻译? what have you been up to today.