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听力题目：
13. (A). You can’t buy the boat.
(B). The boat is very expensive.
(C). It isn’t a sailboat.
(D). I wasn’t able to sell the boat.
14. (A). I frosted the cake when it was ready.
(B). I froze the dessert after we had dinner.
(C). I had already put the steak in the refrigerator.
(D). I cooked for the posters later on.
