Choose the best answer to complete these sentences

II. Choose the best answer to complete these sentences (1,5 pts)
1.  .......it rained heavily, the road was flooded.
 A. Because              B. So                    C. Due to                   D. Because of
2. The victims ............. with food and the water by the rescue team.
A. provided              B. had provided    C. were provided       D. will provide
3. If you .....................the president, what would you do to help the environment ?
 A. are                      B. had been          C. be                            D. were 
4.The Americans use English as their ............... language.
 A. native                 B. foreign              C. official                   D. second
5. Households dump waste into water,.............. it is polluted.
A.because                 B. so                 C. because of              D. causes
6. Don’t drink that water. It’s .............................                                      
A.damaged                B. dumped            C. contaminated         D. flooded