---I find the more we study, the more difficulty we have ________ out Maths problems.
---Oh, I agree with you. Maths is more and more difficult.

He succeeded in ________ a gold medal in school sports meeting.

When Miss Green asked us ________ silent, we stopped ________ at once.

—Do you like swimming?
—Yes, swimming is a good way _______ fit.

____ up late at night is bad for your health.

He prefers _______ to __________.

He spent a week ____ the novel.

The students enjoy _________ English songs after class.

Would you mind _______ the window for me? I feel a little cold.

—Where is Maria?
— I saw her ______basketball just now.