题目

Although Flight MH370 has been missing for months, I do believe it ________ some day in the future.    A．will find  B．won't find   C．will be found D．won't be found 答案：C it所指代的Flight MH370是动作的承受者，所以用被动语态；且although表明后半句与前半句的missing应为转折关系，故选C。荒漠中生活的骆驼刺，地下的根比地上部分长很多，说明了生物__________环境；蚯蚓在土壤中活动，可以使土壤疏松，蚯蚓的排出物还能增加土壤的肥力，说明生物__________环境。