单项选择题
In a second-hand bookshop, Billy came across a book which he thought was certainly a ()edition.
A. rare B. scarce C. seldom D. hardly
单项选择题 There aren’t many wild pandas ()in the world today.
单项选择题 It’s a pity that some of the people（）cannot come to the party.
单项选择题 I’ve worked here since I ()Harvard Business School.
