The father is goodstories.

Boys, don’t lose____ in playing Angry Birds. It is bad for your eyes to play computer games for a long time

Who’s that over there, Is it Jane?—No, It ________ be Jane. She is ill in hospital today.

If it _____ on May Day, we’ll go to Wenzhou Amusement Park.

Did you go aiking with your family last weekend? — No. __________, that we had to give up our plan.