A. Choose the word that has the underlined part pronounced differently from the others.

1. a. eliminate  b. elephant  c. endanger    d. erosion

2. a. pollute        b. species        c. accept          d. receipt

3. a. environment    b. hydroelectric   c. circulation      d. wild

4. a. club       b. lamb      c. doubt       d. bomber

5. a. disease    b. spread    c. breed     d. treat

B. Choose the word whose main stress is placed differently from the others,

1. a. disappearance       b. circulation   c. conservation     d. environment

2. a. conserve   b. pollute    c. circulate         d. eliminate

3. a. nature   b. power   c. damage    d. defence

4. a. vegetation   b. destruction c. variety   d. erosion

5. a. injured  b. valuable c. forest   d. protect

C. Circle the word in which the letters b or p is silent.

1. plants       cup    crop     cupboard

2. bad  double    doubt    bright

3. psychology    potato   paper    possible 

4. fobbed    crab     club  dumb

5. recipe     special    repeat   receipt

6. combine  problem lamb   dublin 

7. pneumonia     equipment   explosion  surprise

8. obey     tomb      table     blade

9. program  people  psalm  pipe

10. debt     able   football   trouble