A. document B. sorry C. grimly D. may A. kg B. at school C. interesting D. offer A. from time to time B. actual C. headache D. set A. competition B. capacity C. cough D. protection A. come on B. hear C. garment D. tower A. see you tomorrow B. sincerity C. riot D. steady A. see you B. of all ages C. pot-holer D. chopstick A. viperine B. chasm C. ladybird D. cold A. a lot B. thank you C. petrify D. fridge A. sincerely B. exchange C. go on a picnic D. take care