What have you been doing since we last met?为什么用过去完成时

what you have been doing Where have you been?What _____ A.did you do B.have you been doing C.have made D.were you doing这个怎么选,为什么, What have you been up to lately? what have you been up to?中文翻译 What have you been up too lately? What have you been up to? what have you guys been up to? What have you been doing lately? what have you been up to lately? what have you been up to? what have you been up to today. what are you up what have you been up to where are you going?和where have you been 和what have you been? Do what you have been told ,_____ you will be punished.A、and B、but C、or D、after all what have you been up to与 how have you been有什么区别? what have you been up to 还是 how have you been up to how have you been and what have you been up to. 1.when you get the paper back ,pay special attention to what _____.A have marked B have been marked C had marked D had been marked