1. In Viet Nam, children start ___________ school at the age of six.                                            A.kindergarten B. secondary               C. high                        D. primary
2. Drinking water ___________ excessive amounts of fluorides may leave a stained or mottled effect on the enamel of teeth.                                                                                                  A.containing B. including                C. making of               D. consisting
3. After dinner, the President got up to ___________a short speech.                                               A.make B. provide                   C. hold                        D. tell
4. People in Central Viet Nam suffer from___________ floods from September to November.              A.continuous               B. continual                 C. continued                D. continuing
5. I’ve got so much spare time now. I’m thinking of taking _________ a new hobby like stamp collecting.                                                                                                                                     A.in B. off                          C. up                           D. over
6. ___________, all animals need oxygen, water, food and proper range of weather.                   A.Being survive B. To survive             C. When surviving      D. Surviving