How did people move the already prepared food if they didn't have freeze pack? A) They put them in plastic bags. B) They use ice to keep the temperature down. C) They cover them with thick cloth. D) They do nothing.
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答案解析:
Mark is unhappy because of[A] his Chemistry homework. [B] a
Mark is unhappy because of[A] his Chemistry homework. [B] a girl in his class.[C