Sally， could you go and help your father wash the car—Why I’m busy now. Amy is lying on the grass doing nothing.

Let’s go and play ________ table tennis. I don’t want to play ______ guitar.

I went to see my friends off at the airport-Is that________you were late for the important meeting[ ]

We haven’t settled the question of __________it is necessary for him to study abroad.

My new CD player has gone wrong twice this week.—Return it to the shop. I bet it isn’t ______ standard.