In his book,he explains both ______ it means to be a scientist and ______ science works.
15.________ this land our home, we will fight until we die
14.How can you cross the river _________ by swimming?
13.—Jane, you have held a wonderful party. —_____.
12.It was in this very village ______ he was born and brought up.
11.Bad luck! Our water supply _______ while we were making our way in the desert.