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【題目】— People cut down many trees every year.
—That's really bad. We should save trees and plant more trees.
A.make ... safe
B.make ... helpful
C.make ... perfect

【答案】A
【解析】劃線部分單詞save詞意為挽救，make ... safe，使…安全的，make ... helpful，使…有益的，make ... perfect，使…很完美，故選A。

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