After many failures the most difficult ______ is how to keep our strength up and fight again.
| A．chance | B．change | C．challenge | D．challenger |
Before us lies the biggest room, _____ with things like guns, dolls and old clothes.
| A．filling | B．filled |
| C．being filled | D．having been filled |
—What do you think of my plan？
—Sorry. What’s that? I_____ about something else.
| A．thought | B．am thinking |
| C．was thinking | D．had thought |
—Who won the election for mayor?
—A manto represent every minority group in the city.
| A．claims | B．is claimed | C．claimed | D．claiming |
______ at the news that his eyes rained tears.
| A．So was Tom sad | B．So sad was Tom |
| C．So sad Tom was | D．So Tom was sad |
—Has your former classmate come back from America?
—Yes, he _____ there for 8 years.
| A．has stayed | B．stays | C．stayed | D．had stayed |