Have you ever been to the Qinghai Lake, Jim?—Yes. That’s the most fantastic place _______ I’ve ever visited.

What will the weather be like tomorrow? –It____ be rainy, cloudy or sunny. Who knows?

With a lot of difficult problems ____, the newly -elected president is having a hard time.

Michael Jordan has failed over and over again in his life. And that is _______ he succeeds.

Our country _______ a lot in the last fifty years.