A. knock on the door B. rudely C. lesson D. depend A. social media B. act C. paragraph D. lasting A. play B. Chicago C. dollar D. too to A. millimeter B. wave C. art D. degree A. publishing house B. mania C. drama D. twin towers A. folk song B. Chinese C. keep in touch D. take a chance A. midsummer B. phone box C. maths D. grasp A. Denmark B. butter C. subject D. time A. building block B. speak C. Utah D. aspect A. stamp B. they're C. listen and do D. within