I was telling about my exciting travels when he _________ with a story of his own.

Healthy diet should ________ some nutrition (营养素), ________ sugar, protein and calcium.

The scientists are able to ____________ accurately when the spaceship will reach the moon.

We ______ for one hour and a half and it is about time we ______ a rest.

—What do you think of the concert given by the famous Hong Kong singer?　—Not so good. In fact, it _____ to be a great disappointment.