After _____ seemed an hour or so, we were able to enter the pavilion.
| A．it | B．when | C．which | D．what |
We know that ________ better future is at ________ hand if all hands come together and pull together.
| A．a; the | B．the; the |
| C．a; / | D．/; / |
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 |