Question

I am used ________ staying in school ________.

1. A.
   to; all day long
2. B.
   to; all long
3. C.
   /; all day
4. D.
   for; all day and all night

Answer 1

A
解析：be used to doing意为“习惯于做……”，all day long (＝all day) 意为“整天”。题意为：我习惯整天待在学校。