The problem ______ many children,especially girls,have ______ school is getting more and more serious.

Jim, is physics difficult to learn in high school —Sure. No subject can be learned well ________ hard work.

We don’t need to do extra work this eveningThe day’s work was almost ______ now.[ ]

I had hardly sat down_____ the telephone rang

I hear Tom is good at ______, isn’t he— Are you joking Tom is weak at it. He doesn’t even know where Japan is.