1. Holes in ozone layer can……………..in skin cancer. A. lead B. result C. cause D. make 2. ……………………pollution happens when human activities destroy the Earth's surface. A. Noise B. Visual C. Thermal D. Soil 3. Farms using ……………..to kill insects and herbicides to kill weeds can also lead to water pollution. A. fertilizer B. chemical C. pesticides D. dynamite 4. Polluted water also causes the death of …………………..animals such as fish, crabs, or birds. A. aquatic B. land C. amphibians D. overhead B. WRITING I. Rewrite the following sentences, using conditional sentences Type 1 or 2 1. Ngoc’s father is upset because she doesn’t study hard. (if) →……………………………………………………………………………………………………………………………………... 2. I need any help. I will call you. (If) →If…………………………………………………………………………………………………………………………….….…. II. Rewrite the second sentence so that it means the same as the first, using the words in brackets. 1. Noise pollution happens. There is a change in animals’ living pattern. (leads to) →……………………………………………………………………………………………………………………………. 2. Acid rain is dangerous. Trees’ leaves are damaged. (because of) →…………………………………………………………………………………………………………………………….