Unit X

Ex. 1. 1. d; 2. i; 3. p; 4. l; 5. a; 6. r; 7. c; 8. k; 9. q; 10. g; 11. e; 12. n; 13. f; 14. h; 15. b; 16. j; 17. m; 18. o.

Ex. 2. 1. f; 2. h; 3. a; 4. j; 5. c; 6. d; 7. i; 8. e; 9. b; 10. g.

Ex. 3. 1. d; 2. h; 3. a; 4. f; 5. c; 6. i; 7. e; 8. b; 9. g.

Ex. 4. verb/noun 1. discovery; 2. invention; 3. complain; 4. operation; 5. develop.

noun/adjective 1. hopeless/hopeful; 2. popularity; 3. truth; 4. guilty; 5. electricity.

Ex. 5. 1. discovered; 2. operation; 3. invention; 4. developed; 5. complaint; 6. popularity; 7. guilty; 8. electricity; 9. truth; 10. hopeless; 11. discoveries.

Ex. 6. A. 1. unique opportunity; 2. important discovery; 3. simple experiment; 4. new invention; 5. illegal drugs; 6. popular novels.

B. 1. tell; 2. keep; 3. commit; 4. give; 5. develop; 6. make.

Ex. 7. 1. to; 2. by; 3. of; 4. from; 5. for; 6. out of; 7. for; 8. about; 9. in; 10. at; 11. by.

Ex. 8. 1. c; 2. a; 3. a; 4. b; 5. b; 6. a; 7. c; 8. a; 9. c; 10. b.

Ex. 9. 1. criminal; 2. accurate; 3. cells; 4. domestic; 5. litter; 6. suspects; 7. annoys; 8. disease; 9. heartbroken; 10. being broke.

Unit XI

Ex. 1. 1. g; 2. d; 3.m; 4. h; 5. a; 6. c; 7. o; 8. l; 9. e; 10. p; 11. f; 12. j; 13. b; 14. k; 15. i; 16. n.

Ex. 2.1. c; 2. f; 3. i; 4. g; 5. a; 6. e; 7. d; 8. b; 9. h.

Ex. 3. 1. i; 2. f; 3. a; 4. h; 5. b; 6. e; 7. c; 8. j; 9. g; 10. d.

Ex. 4.noun/adjective 1. ambitious; 2. possibility; 3. active; 4. stranger.

verb/noun 1. decide; 2. leader; 3. expression; 4. fail; 5. erupt.

verb/adjective 1. frightening; impressed; agree; global.

Ex. 5. 1. ambition; 2. impressed; 3. failed; 4. active; 5. frightening; 6. possibility; 7. expression; 8. leader; 9. global; 10. stranger; 11. agreed; 12. erupted.

Ex. 6. A. 1. accepted; 2. become; 3. had; 4. made; 5. run; 6. make.

B. 1. food; 2. contaminated; 3. political; 4. great; 5. ambitious; 6. direct; 7. redundancy.

Ex. 7. 1. at; 2. on; 3. of; 4. in; 5. in; 6. –; 7.about; 8. of; 9. for; 10. on.

Ex. 8. 1. turn off; 2. pick up; 3. put off; 4. throw away; 5. look for; 6. look out; 7. try on; 8. look after; 9. run out of; 10 take off; 11. get on; 12. break down; 13. look up.

Ex. 9. 1. c; 2. b; 3. b; 4. c; 5. a; 6. c; 7. b; 8. c; 9. a; 10. b.

Ex. 10. 1. junk; 2. afterwards; 3. can’t stand; 4. freeze; 5. crazy; 6. shanty town; 7. eventually; 8. an extinct volcano; 9. huge; 10. chatter.

Unit XII

Ex. 1. 1. h; 2. d; 3. n; 4. j; 5. b; 6. m; 7. e; 8. a; 9. f; 10. l; 11. p; 12. c; 13. g; 14. o; 15. k; 16. i.

Ex. 2. 1. c; 2. h; 3. j; 4. f; 5. a; 6. e; 7. b; 8. i; 9. g; 10. d.

Ex. 3. 1. d; 2. g; 3. i; 4. a; 5. f; 6. c; 7. e; 8. j; 9. b; 10. h.

Ex. 4. verb/noun 1. delivery; 2. explore; 3. succeed; 4. sympathy; 5. climb.

noun/adjective 1. successful; 2. homeless; 3. delight; 4. crowd; 5. dirty.

Ex. 5. 1. homeless; 2. dirty; 3. explore; 4. succeed; 5. climb; 6. delivery; 7. successful; 8. crowded; 9. sympathetic; 10. delighted.

Ex. 6. A. 1. follow; 2. stay; 3. take; 4. work; 5. set off; 6. plan; 7. break; 8. read.

B. 1. outdoor; 2. long; 3. fresh; 4. record; 5. physical; 6. silly; 7. highest; 8. subway.

Ex. 7. 1. to; 2. for; 3. for, up with; 4. in; 5. –; 6. in; 7. on; 8. for; 9. of; 10 to, about.

Ex. 8. 1. b; 2. c; 3. b; 4. a; 5. c; 6. a; 7. b; 8. b; 9. a; 10. c.

Ex. 9. 1. delighted; 2. challenge; 3. income; 4. continent; 5. brief; 6. hero; 7. journey; 8. crowded; 9. climb; 10. followed