You should make an ____ plan in case anything unexpected happens.
A．a(chǎn)ctiveB．a(chǎn)lternativeC．convenientD．economic
B
考查詞義辨析。 Active 積極的，alternative 可供選擇的， convenient 方便的，economic 經(jīng)濟的，句意：你應(yīng)該做出一個可供選擇的計劃，以防預(yù)想不到的事情發(fā)生。所以選B。
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