题目

在农田中,大雨过后往往会有大量蚯蚓钻出地面,这是因为(   ) A.土壤中的温度太低                                    B.土壤中缺少食物 C.土中水多,氧气少,无法呼吸                   D.地面上温度高,有大量食物 答案:C You'd better take something to read when you go to see the doctor ______ you have to wait.    A. even if            B. as if            C. in case           D. in order that
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