)complete the question using the verb in brackets. a. do bones stop growing (stop) b. how much water _the brain (contain) c. _ you _hair on your tongue (have) d. how many square metres an adult's skin (cover) e. hair faster in hot weather (grow) f. how long_the heart to pump blood around the body (take) g. muscles _ or push (pull) h. which vitamin _ the liver (produce) i. how many times a day _you in and out (breathe).

a. Do bones stop growing?
b. How much water does contain the brain?
c. Do you have hair on your tongue? 
d. How many square metres an adult's skin covers?
e. Does hair grow faster in hot weather?
f. How long does it take the heart to pump blood around the body?
g. Do muscles pull or push?
h. Which vitamin does the liver produce?
i. How many times a day do you breathe in and out?