Internet users are warned to be ________ about giving away personal information to strangers.
A．cautious B．anxious C．particular D．sensitive
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
