Question 11: He hasn’t got his hair cut for two months. It has been two months ……………………………………………………… Question 12: Although Singapore is a developed country, it is not polluted by industry Despite ………………………………………………………………… Question 13: It is interesting to study tourism. Studying ……………………………………………………………… Question 14: New Zealand and Australia are both surrounded by the sea. Both New Zealand and Australia ……………………………………… Question 15: Australians use English as their mother tongue so they are native speakers. Australians are native speaker