— Hey, the washing up has been done!
— That ______ Cynthia．She’s always helpful.
A．need have been B．could have been
C．should have been D．must have been
Meyer and his team were the first ______ how the disease spreads from animals to humans.
A．showing B．show
C．to show D．shown
— Are you ready for the history test tomorrow?
— No, I wish I ______ the clock back.
A．had turned B．could turn
C．will turn D．would have turned
He had a great desire to have a home of his own, ______ he had always lived with his grandmother.
A．or B．and C．so D．for
This computer is different from the one I ______ in my last job.
A．use B．have used
C．used D．had used
More subway lines ______ to make travelling easy in Beijing in the coming years.
A．will build B．will be built
C．build D．are built
