All her energies are ______upon children and she seems to have little time for anything else.
| A．guided | B．aimed | C．directed | D．focused |
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 |