... terrifies D. terrifying 19. The water in this area is __ _ __ _ __ . A. polluting B. pollute C. polluted D. pollution 20. The boy was __ __ _ __ _ __ _ when he was 2 years old.A. abandoned B. increased ... Mang. Built (33 )__ __ _ _the northern bank of (34 )__ __ _ _Perfume River, the Imperial City was influencedby the style of French architect Vauban. The city (35 )__ __ _ _three sections: the Royal Citadel, ... Form36. Trees and other plants play an important part in the natural __ __ _ __ _ of water, (circulate) CIRCULATION37. Rare, __ __ _ __ _ _, or threatened plants and animals are elements of our natural heritage,...