单项选择题

You should ask any questions regarding this matter of Dr. Raphael or one of ______ assistants.

A. he
B. him
C. his
D. himself
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Our decision on whether to boost our long or short positions ______ on any change in the direction of the market, usually driven by the demands.
A. was depended
B. depend
C. depends
D. depending
单项选择题
Gift packaging will be ______ for all items in our store without any additional charge during the Christmas rush.
A. available
B. presentable
C. receivable
D. enjoyable
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