(2013·泰安一中月考)—John has put forward ________ most challenging question for us to answer.
—Yes，it really is.I have never heard ________ harder one.
A．the；/ B．/；the C．the；the D．a；a
(2013·无锡一模)The education of ________ young is always ________ hot and serious topic.
A．/；/ B．the；a C．/；the D．the；/
(2013·西安一中月考)As ________ unemployment is very high at the moment，it's very difficult for people to find ________ work.
A．the；/ B．/；/ C．the；a D．an；the
(2013·昆明二模)The operation is ________ success and the patient is now out of ________ danger.
A．a；the B．a；/ C．/；the D．/；/
(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；/
