单项选择题

If you want to lose weight, you should not take such food ______.

A. as is not really necessary
B. as it is not really necessary
C. as it was not really necessary
D. as was not really necessary

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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

单项选择题

I don't know you want to keep the letter. I've ______ it up.

A. torn
B. given
C. broken
D. disposed

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