A. set fire to B. shelf C. unutterable D. celery A. grandchildren B. jelly C. stripe D. manual A. concentrate on B. forget C. true D. exist A. English B. forever C. victim D. pay attention to A. library B. engine C. duty D. sweep up A. restaurant B. father C. lap D. downhill A. the greenhouse effect B. that's C. in one go D. in A. spoken B. tentative C. building D. phonetics A. potassium B. theater C. speak D. missing A. closely B. pedestrian C. evening D. convert