单项选择题

Please notify us of any number at which your guardian can be contacted ______ there is an emergency.

A. therefore
B. even if
C. in case
D. despite
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We cannot process your order ______ we have received the deposit mentioned in our mutually agreed contract.
A. while
B. during
C. until
D. if
单项选择题
The manufacturing company neither provided a full refund for the defective refrigerator ______ replaced it with a new one,
A. yet
B. neither
C. nor
D. or
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