Milk quickly goes bad _______ it is put into the fridge.( )
A.ifB.unlessC.whetherD.until
()He hardly goes to school by car, _________ he?
----________________? ----He’s very fine. Thank you.
--I can’t solve the math problem because it is too difficult. What should I do? -- _________ ask the teacher for help?
— ? —I like action movies.
—— do you of the sports shows? ——They’re interesting.