To keep healthy, Mr. Smith_______ cycling as a regular form of exercise after he retired.

I couldn’t get through to you at home last night. You must have gone out then, ________? — Yes, I went to the cinema.

How many students are born _________thestar sign of Aquarius in your class

It ______ we know the result of the experiment.

Mr Li began to teach in this school, _______, some time later, she became popular with the teachers and students for her excellent teaching levels.