He ran ________ fast that I couldn’t catch up with him.

 Jogging is an effective way to keep fit. _____ , swimming is helpful for bodybuilding.

________ they heard the shout for help，they rushed out.

When Helen saw her tutor nod _______ to her, she calmed down and went on with her performance．

 — Do you know the reason why the Whites got divorced? — No, they haven’t quarreled with each other since they got married. _______, they broke up finally.