Not only Mr. and Mrs. Green but also their daughter ________ to China twice.

was younger, I’d often go for _____ drive withsome friends, purely for _____ enjoyment of it.

I think ____necessary for us _____the birds.

News that the president’s life was________could cause the nation’s economic crisis to become worse.[ ]

________ mainly for the invention of the telephone, Alexander Graham Bell devoted his life to helping the deaf.[ ]