1. Air__________ is one of the problems that people have to deal to with. (pollute) 2. You should buy this book. It’s very__________. (inform) 3. Covid 19 is a__________ pandemic which has caused a lot of deaths. (danger) 4. He apologized for the__________ he had caused. (convenient) 1. For your__________, the library is on the third floor. (inform) 2. This is one of the best__________ films showing the lives of working people. (document) 3. The government has introduced some__________ measures to reduce unemployment. (effect) 4. He is a__________ boy. He is always asking questions. (curiosity) 1. English is now an effective medium of international__________. (communicate) 2. All of us have to be__________ when going on the street. (care) 3. She answered all my questions__________. She got the highest mark. (logic) 4. This fashion__________ wants to modernize the traditional Ao Dai. (design) 1. Traditional__________ are a good source of fun and entertainment. (celebrate) 2. __________ is now a serious problem in Viet Nam. (Forest) 3. Britney Spear is not only a great__________, but also a talented singer. (perform) 4. The weather today was__________ hot. (extreme)