—Are you going to the concert tonight?
—I should have told you that I won’t, ______?
A． haven’t you B． shouldn’t you
C． are you D． will you
“The impact will only grow Iran’s leaders decide to change course and meet their international obligations,” US Secretary of State Clinton warned．
A． in case that B． provided that C． unless D． until
I was standing atop a North Carolina mountain, the afternoon sun______like golden lace through the trees．
A． threaded B． threading C． being threaded D． was threaded
Some people claim the rumor that some Egyptians are planning a 100,000 people anti-government protest．
A． to overhear B． to have overheard
C． having overheard D． to be overheard
In his lecture, the professor referred to the belief, in contrast to all other countries, ______the elderly are wise, ______is particularly dominant in the Chinese culture．
A． that; one that B． that; that C． which, which D． that; one
—Please go on with your demonstration．
—But where was I?
—Well, you_____the two chemicals together．
A． tried to mix B． were trying to mix
C． were trying mixed D． had tried to mix
