99.—I bought the coat for 210 yuan last week.-- It’s on sale today for 199 yuan . You should have waited.-- Oh , really? But how ________ I know?A.would B.did C.can D.do
问题描述：
99.—I bought the coat for 210 yuan last week.
-- It’s on sale today for 199 yuan . You should have waited.
-- Oh , really? But how ________ I know?
A.would B.did C.can D.do
答