(2013·咸阳二模)—Have you seen ________ pen？I left it here this morning.
—Is it ________ black one？I found it in the corner.
A．a；the B．the；the C．a；a D．the；a
(2013·南阳两校联考)Keeping a diary is ________ good habit，by which you'll make ________ great progress in writing.
A．a；a B．a；/ C．the；a D．the；/
(2013·合肥一中二模)I don't know who invented ________ iphone，but I think it is ________ useful invention.
A．the；a B．the；the C．an；the D．an；a
(2013·福建四地六校联考)—Which of the twin brothers is easier to get on with?
—________ younger one.He is ________ most humorous man.
A．A；a B．A；the C．The；a D．The；/
(2013·邯郸一模)It is said that ________ wool produced in Australia is of ________ high quality.
A．/；/ B．the；/ C．the；a D．the；the
(2013·安徽示范高中摸底考试)— How did you do in your essay?
—I got ________ okay grade，but Mr.Jones gave Sarah top marks.She's ________ teacher's pet，you know.
A．/；a B．an；/ C．/；the D．an；a
