Which sentence uses the correct form of the verb?

a.
that clock do keep time very well.

b.
that clock don't keep time very well.

c.
that clock does keep time very well.

Where are the worlds languages distributed?

Afootball game between the thunder and the sharks is in its closing minutes, with the thunder ahead by 20 points. the thunder’s coach considers sending in the second-string quarterback. this would reduce the risk of the star quarterback getting injured, but the second-string quarterback is not very good. complete the passage describing the coach’s decision in economic terms.

And intervening opportunity is an example of