Neither its cause nor its     1     was understood. So many thousands of     2    people died every time there was an outbreak. John Snow wanted to face the     3     and solve this problem. He knew that cholera would never be controlled     4     its cause was found.

England is the largest of the four countries, and for     5       it is divided     6     into three zones. ... .Although,     7    , these cities are not as large as     8    in China, they have world-famous football teams and some of them even two!

Having said this he spread some food on the table, and produced a bed from the floor. After he left, I had a     9     meal and a hot bath. Exhausted, I slid into bed and fell fast     10    .