A. sixty B. abacus C. crispy D. oil A. eighty B. skill C. arrow D. skull A. sum B. children C. mood D. selflessly A. be based on B. joke C. wrong D. seriously A. seventy B. rectangular C. nitrogen D. mother tongue A. stitch B. grammar C. forty-six D. provide A. beside B. squint C. reveal D. twenty A. tool B. bar C. forty D. cut down A. take apart B. easy C. forty-four D. summer holiday A. mighty B. homework C. toothbrush D. clean the floor