A. stack B. crayon C. tidy the desk D. aid A. isn't B. tide C. thrust D. focus on A. driving licence B. minimum C. advertising D. over there A. tend B. hover-train C. ruler D. else A. forget B. desire C. become D. pencil case A. cream B. aggravate C. varied D. where's A. indefinable B. that's C. litter D. the Olympics A. eat up B. pen C. dump D. go home A. explain B. in favour of C. incident D. pencil A. schoolbag B. Tai Chi C. give away D. refer