He prefers playing basketball, she prefers playing computer games.
A．while B．so C．and
—Which do you prefer, a glass of water or a cup of tea?
— . Thanks. I’m not thirsty.
A．Both B．Either C．Neither
—How many people did you see in the meeting room?
— .
A．Nothing B．No one C．None
—He is late for the meeting.
—
A．So I am. B．So am I. C．So do I.
—What a nice motorbike! How long have you it?
—About half a year.
A．had B．bought C．taken
There are several chemical factories waste water into the river.
A．pour B．pouring C．pours
