单选题
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
【正确答案】
D
【答案解析】
解析：A项substitute意为“代用品”；B项selection意为“选择，挑选”；C项preference意为“偏爱；优先选择”；D项alternative意为“选择，替换物”。
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