Mini-test of 12 questions is here! 

1. ______A) An improved toothbrush
    ______B) Recent developments in genetics
    ______C) New uses for bacteria
    ______D) A means of fighting tooth decay

2. ______A) They have many side effects
    ______B) They occur naturally in people's mouths
    ______C) They attack one type of bacteria
    ______D) They cause tooth decay

3. ______A) Microbiology 
    ______B) Genetic engineering
    ______C) Dentistry
    ______D) Civil engineering

4. ______A) Plan A includes dinner, but Plan B does not
    ______B) Plan B is more expensive than Plan A
    ______C) Plan B includes Sunday dinner, but plan A does not
    ______D) Plan A provides for three meals on most days while Plan B provides for only two