_____ is known to everybody, the moon travels round the earth once every month.
Was it in 1997______he was still at middle school_______ this boy became an expert at computer?
------What do you think made Mary so upset? -------- _________her new bicycle.
------What game is popular with them? -------- The________ most is tennis.
No matter how________, it is not necessarily lifeless.
____________, so he didn’t come to school last week.