【題目】They failed several times, and they finally __________ the hope of finding an effective way of solving the problem.

A. abandoned B. released C. discouraged D. resigned

【答案】C

【解析】他們失敗了好幾次，他們終于泄氣，找出解決問題的有效途徑的希望。A項是遺棄;B項是防范;D項是辭職.

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