【題目】The math problem was the most difficult one I had ever met, but I________to work it out at last.
A.tried
B.managed
C.succeeded
D.failed

【答案】B
【解析】考查動詞詞義和用法上的區(qū)別。try to do“努力做;企圖做”;manage to do“設(shè)法做成”; succeed(in)doing等于manage to do“強(qiáng)調(diào)成功做到(著重結(jié)果)”;fail to do“失;沒做到”。

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