单项选择题

Because the war between the two countries shows no sign of ending, oil has ______ in price over the last five months.

(A) arisen
(B) raised
(C) risen
(D) aroused
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单项选择题
The sales department has doubled its ______ of staff members because of the new branch office that is scheduled to open up next month.
(A) number
(B) amount
(C) percent
(D) width
单项选择题
______ we cannot compete with the flood of cheap imported socks, we must strive to produce higher quality products.
(A) Unless
(B) Despite
(C) As
(D) While
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