save the explanation -- no need to explain one s booked -- one s schedule is filled schoolwork is suffering -- interfere with studies scorcher -- hot // heat secondhand -- used severe weather -- bad weather shade -- away from the window shake -- move shake it off -- remove share the expense -- pay for some of … show up -- appear shut -- close shy -- timid sign up for a lesson -- take a lesson simultaneously -- together slip one s mind -- forget so -- both sooner -- earlier sorry -- regret soundproof -- noise spare -- extra // another one speechless -- unable to speak spotless -- clean squint at sth. -- poor vision standng ovation -- stand up and applaud staple -- necessity stay on top of sth -- keep in formed stay put -- not move sth doesn t ring a bell with sb -- sb. doesn t recognize sth stick with it -- it ll make a long time to … stood up for -- defended straighten out -- pay supervisor -- person in charge of … switch off -- turn off