--- Credit cards are useful when travelling.
—True. They save us the trouble of taking too much cash.
A. exactly
B. gradually .
C. particularly
D. hardly
网友回答
A. exactly
B. gradually .
(答案→)C. particularly
D. hardly
解析：考查副词。exactly准确地；gradually逐渐地；particularly尤其；hardly几乎不能。句意：——信用卡在旅游时特别有用。——的确，他们省了许多花现金的麻烦。