Mark the letter A, B, C or D to indicate the word whose underlined part differs from the other three

Mark the letter A, B, C or D to indicate the word whose underlined part   differs from the other three in pronunciation in each of the following questions.

1. A. earplug

B. dump

C. unique

D. mudslide

2. A. thermal

B. thunder

C. northern

D. earth

Mark the letter A,B,C or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

3. A. destroy

B. pollution

C. national

D. historic

4. A. biology

B. trainee

C. typhoon

D. chemical

Mark the letter A,B,C or D to indicate the underlined part that needs correction in each of the following questions.

5. If she were him, she will see the doctor immediately?

    A          B                   C                                  D

6. My children did all their homework before they played badminton.

       A                B                       C                               D