__the morning they usually do sports. But___ yesterday morning they cleaned their A. In, on B. In, / C. On, on
Our teacher said that light______ faster than sound.
Jack is _____ busy ______ he often forgets to have breakfast.
—Are you free this Sunday? — Yes. If it_____ , I will go shopping with mum.
Lily practises _______ the piano very hard.
Hurry up. There’s _____ time left.