单项选择题

When travelling, you are advised to take travellers' checks, which provide a secure______ to carrying your money in cash.

A. substitute
B. selection
C. preference
D. alternative
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单项选择题
She gave ______ directions about the way the rug should be cleaned.
A. explicit
B. brisk
C. transient
D. opaque
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The Eskimo is perhaps one of the most trusting and considerate of all Indians but seems to be ______the welfare of his animals.
A. critical about
B. indignant at
C. indifferent to
D. subject to
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