A. impossible B. impose C. quickly D. snorkelling A. italics B. make a mistake C. concept D. astronomer A. ship B. improve C. across D. climb a hill A. natural B. without doubt C. equal D. tasty A. mud B. publishing C. letter D. protect from A. output B. jog C. encounter D. advise A. vast B. notebook C. computer D. target A. lift up B. concoct C. quit D. look up A. opaque B. in the end C. instructions D. practise A. place B. change into C. category D. drainage