2. 外语
  3. He had tried to ______ sleep by all his usual methods, but with no success.

He had tried to ______ sleep by all his usual methods, but with no success.

admin2011-01-26  31
问题 He had tried to ______ sleep by all his usual methods, but with no success.
选项 A、secure
B、induce
C、impact
D、infer
答案B
解析 (induce引起，导致)。句意为：他想尽各种常见的办法催眠，但均未成功。 A．secure保证，获得；C．impact对……产生不良影响；D．infer推断。
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