If you try to smile _______ life, you’ll always be _______ a good mood. A. in, in B. at, in C. in at
-- __ behind the door? --No, they aren't.
--__is that on the desk? --My Chinese book.
Who's the little girl __ a yellow hat?
Look __the map. It's a map __ China.
--What's this? --It's__ backpack. --Where's__ backpack?--It's on the bed.