If you are a little careful, I think you can _____the problem.

My best friend told me that he wasn’t used to ______ by plane and he used to ______ uncomfortable.

—Do you know who are the two women?  —Oh, they ____ movie stars. They’re popular these days.

After eight hours’ hard work,  the firemen finally_________the forest fire.

It was nothing but 10 years of hard work that _______his success in business.