2. 外语
  3. George had difficulty in swimming across the lake, but he finally succeeded on his fourth______.

George had difficulty in swimming across the lake, but he finally succeeded on his fourth______.

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问题 George had difficulty in swimming across the lake, but he finally succeeded on his fourth______.
选项 A、attempt
B、display
C、effort
D、trial
答案A
解析 attempt表示“尝试”，作名词时常与on连用；display意为“展示”；effort意为“努力”，不能与介词on连用：trial意为“试验，考验，审讯”。
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大学英语四级

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