"They didn't take measures in time, otherwise the explosions ____．"some experts said．
A．wouldn't happen B．didn't happen
C．wouldn't have happened D．mustn't have happened
Please don't make so loud noise．The news of the volcanic eruption in Indonesia ____and I want to listen．
A．is broadcast B．is being broadcast
C．has been broadcast D．had been broadcast
The doctor's treatment has worked marvels: the patient has completely．
A．repeated B．returned C．recovered D．reminded
—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
