Multiple choice

We are all much too ........... about the quality of our water-supply.

  1. comprehensive

  2. common

  3. complimentary

  4. complacent

  5. conceivable

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Complacent is an adjective meaning showing smug or uncritical satisfaction with oneself or one's achievements. The sentence criticizes people for being too uncritical or unconcerned about water quality, making complacent the correct choice.