I. Complete the sentences, using the words and phrases given. You can add some words and make changes. 1. The major cause/ water pollution/ Vietnam/ be the weakness in industrial wastewater management. 2. Many factories/ use fresh water/ carry away waste/ their plants/ canals, rivers, and lakes. 3. Most/ them/ not have a wastewater treatment system. 4. Another cause/ water pollution in Vietnam/ be the lack/ awareness among citizens. 5. Every day people/ generate a/ of garbage,/ they throw it directly into canals, river,/ponds.