David wants to be ________ engineer while Cathy wants to be ________ doctor.
A．an; the B．the; the C．the; a D．an; a
Nowadays，scientists are working hard to find a best way of treating addictions ________ drugs.
A．of B．in C．on D．to
It was so ________ having to sing in public.
A．embarrassed B．embarrassing C．nervous D．embarrassingly
—Did you look up the time of trains to Shanghai?
—Yes，the early train is ________ to leave at 5：30 am.
A．likely B．about C．possible D．due
—My uncle suggests I ________abroad.
— I would rather you ________at home.
A．go；stay B．went；stayed C．go；stayed D．went；stay
The government is ________ everyone to save water.
A．appealing to B．appealed to C．begging D．appealing for
