—Which of the caps will you take? --I’ll take _______,one for my father ,the other for my brother.

They did not buy ___ milk. 

--______she?---She’s my sister.

—How much vinegar did you put in the soup?  —I’m sorry to say, ____. I forget. 

Science is more than a collection of unrelated facts; to be meaningful and valuable,________ must be arranged to show generalized character.