题干
-- Whose guitar is it? -
A：My violin is at home.
B：I can swim.
C：It's Ann's guitar.
答案(点此获取答案解析）
C
-- Whose guitar is it? -
A：My violin is at home.
B：I can swim.
C：It's Ann's guitar.
为等，
为等比，且
，
，关于
）
