We meant to finish the work by dark, but we were so tired that we could not ______.

—Have you　　 your application form,Janet?—Not yet.

Although the price of the gas ______, many people still plan to buy private cars.

 Premier Wen Jiabao said that if we worked hard and____ optimistic,we were_____ win the war against the finanical crisis.

That hero who died in the war was so brave that he never _____ to the enemies until death.