在英国旅游时会经常看到一些标志，你知道下列哪个是表示“No Smoking”?A． B． C．
They don’t have ___________ colour pencils,but I have ___________.
--- ________ under the tree? --- No，they aren’t.
--- ________ my baseball? --- It’s under the chair.
Too bad! We have _____ food at home today.
It’s important ________ the piano well.
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