It seems that our early human ancestors may have used grass, which
was easily found and ready to use, to floss between their teeth. As
Hlusko suggests in the journal Current Anthropology,“Toothpicking
with grass stalks probably represents the most persistent habit docu-
mented in human evolution.”
- In line 5 the word positedmost nearly means
a. insisted.
b.demanded.
c. questioned.
d.suggested.
e.argued.
- Each of the following reasons is provided as evidence that early
man used grass stalks as toothpicks EXCEPT the
a. width of the grooves on ancient teeth.
b.location of the grooves on ancient teeth.
c. ready availability of grass.
d.ongoing use of grass toothpicks.
e.abrasive quality of grass.
- Dr. Hlusko’s approach to determining the source of the grooves on
ancient teeth can best be described as
a. zealous.
b.persistent.
c. sullen.
d.serendipitous.
e.cautious.
- The passage suggests the theory that early man used grass stalks as
toothpicks is
a. a possibility.
b.very probable.
c. absolutely certain.
d.fanciful.
e.uncorroborated.
(20)
