A. thrill B. motorcycle C. pair D. vaccination A. camel B. peer C. architecture D. skill A. seize B. drill C. autograph D. nutshell A. participate B. the United States C. CD D. grill A. the number of B. megacycle C. worth D. bill A. kill B. rigid C. label D. motor neurone disease A. wrong B. take a message C. scholarship D. ill A. landfill B. calculator C. Swedish D. the day before yesterday A. be in trouble B. resort C. thresh D. windowsill A. play chess B. till C. lamp D. invisible