—You ought to have made an apology to Tom yesterday evening．
—Yes, I know I __ __．
A．ought to have B．have to C．should D．must have
The government officials met the workers and engineers working on the stadium, most____ were migrant workers．
A．of which B．of who C．of whom D．of them
—Why are you so late?
—The driver couldn't see clearly because of the fog．____, the road was too icy．
A．Therefore B．Otherwise C．However D．Besides
With your brother's help, I've made great progress in English and I really want to do something for him ____．
A．in turn B．by turns C.in return D．in answer
—I am afraid this pair of shoes is a little expensive．
—If you really want to buy them, I will give you a ____ of 10 percent．
A．quantity B．amount C．discount D．account
—Have you heard ____ news that over 10,000 people lost their lives in the earthquake in Japan?
—Not yet．What ____ big surprise!
A．the; a B．the; / C．/; / D．/; a
