Don’t be afraid of difficulties. They can help you______ experience, and experience can, in return, broaden your horizons.

—How do you like the football match?　—Wonderful, I believe. Just as fine as _____ of the matches we’ve ever seen.

—Such a mistake could have been avoided. —Unfortunately, he _______ the mistake again and again.

This is the first time that I _____ at the meeting.

Bob would have helped us yesterday, but he-_______