Is he the only one of the students who ________ here just now?
A．is B．are C．was D．were
We ________ jump to conclusions before we have all the facts.
A．couldn't B．mightn't C．shouldn't D．mustn't
It was several years ________ I realized ________ David had lied to me.
A．when; that B．that; when
C．before; that D．until; why
The project will help people understand the many threats to the natural environment ________ endangered plants and animals live.
A．which B．when C．where D．that
—How do you think I can make up with Johnson?
—Set aside ________ you disagree and try to find ________ you have in common.
A．what; what B．where; what
C．what; which D．where; which
—What do you think of the news in today's newspaper?
—We shouldn't ________ the trouble of helping others only because what we do may invite trouble.
A．knock off B．take off
C．keep off D．break off
