The managing director took the ________ for the accident, although it wasn't really his fault.
A．charge B．account C．blame D．cause
—Car prices have been going down sharply in the last 20 years.
—It's not surprising because the law of market ________ the price of a product.
A．is controlling B．controls
C．has controlled D．controlled
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
