Question

--What        you         for your vacation?
--I plan to visit my grandparents.

A．do, do

B．are, doing

C．did, do

D．are, do

Answer 1

B

what are you doing for vacation?你假期准备做什么？
用现在进行时态表示将来时，结构是be+doing，意思是对将来的一种打算，翻译是计划，将要。