单项选择题

When traveling, it is possible that you may be advised to take the travelers' checks, which provide a secure ______ to carrying your money in cash.

A．selection
B．preference
C．alternative
D．substitute
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Beth could ______ her coat because it had largered buttons.
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To drive a car safely, it is ______ good brakes.
A．essential with
B．essential having
C．essential to have
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