– I was going to the concert with you his weekend, but I can’t now. -- ______.
The experiment shows that proper amounts of exercise, if _____ regularly, can improve our health.
_______I toured Zhangjiajie, I was deeply impressed with its beautiful scenery.
At the meeting they discussed three different______ to the study of mathematics.
The music, ___ which the active elderly were dancing, sounded a bit familiar ____ me.
Our teacher often makes a schedule to get herself _______ of what is to be done in the day.