Choose the best answer A,B,C or D to complete the sentences below

6.In the United States, there are 50 __________ and six different time zones across the country.

A.states B.nations C.towns D.countries

7.I once tried to __________ apple pie when I was in London. It was really delicious.

A.do B.cook C.make D.show

8.Nowadays you still see the __________ men wear kilts (skirts) to wedding or other formal occasions.

A. Scotland B. Scottish C.Scots D.Scot

9._____________ water is one of the factors that have driven many species to the verge of extinction.

A.Contaminating B.Contaminate C.Contamination D.Contaminated

10.In many poor nations, there are frequent outbreaks of cholera and other diseases because people _____________ untreated water.

A.drink B.to drink C.drinking D.drank

11.In some English speaking countries, turkey and pudding are __________ food at Christmas.

A.national B. traditional C. historical D.possible

12.People __________the flooded villages when rescue works arrived

A.leave B.left C.had left D.leaving

13.The road in front of my office is always __________ when it rains heavily.

A.to flood     B.flooding   C.flood   D.flooded