A. all year round B. organizational C. memory-chip D. guitar A. carbon dioxide B. who C. top D. arrive in A. amber B. quit C. more D. postman A. forty B. class C. inveterate D. housework A. bye-bye B. photo C. have an effect on D. archway A. live B. else C. cry out D. since then A. describe B. believe C. sterilize D. climber A. seven B. retrace C. southeast D. over A. drum B. digital C. danger D. shorter A. computer programmer B. silicon C. write D. neurotoxic