________ material used for running tracks in schools across China may be ________ danger to children's health.
A．/；a B．The；a C．/；the D．The；the
(2013·安徽皖南八校联考)I sent a big bunch of flowers to the nurse as an ________ of thanks for her taking good care of my grandpa in the nursing home.
A．attitude B．impression
C．appreciation D．expression
(2013·潍坊三县一模)If you don't work hard，it will be of no ________ for others to help you.
A．sympathy B．significance
C．relation D．sign
(2013·杭州一模)Two of my friends are having their weddings on the same day，and I'm in a real ________ about which one to go to.
A．situation B．choice C．trick D．dilemma
(2013·泉州质检)In a natural disaster，minutes and even seconds of warning can make the ________ between life and death.
A．division B．difference C．separation D．sense
(2013·银川一中一模)The TV series of Gong became popular and the theme song Love the feed sung by Yang Mi was a ________ at once and loved by young people.
A．shock B．strike C．hit D．beat
