Choose the best answer A, B, C or D to fill in the blanks

III. Choose the best answer A, B, C or D to fill in the blanks.
 

1. Air pollution has a bad influence ___ the environment.

A. at                            B. in                            C. on                           D. by

1. Physichal changes are different for everyone, so you don’t need to feel embarrassed or ___.

A. frustrated               B. tense                       C. confident                D. delighted