He had tried to ______ sleep by all his usual methods but with no success.A.secureB.induc
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He had tried to ______ sleep by all his usual methods, but with no success.
A.secure
B.induce
C.impact
D.infer
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正确答案: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。
