10 Smoking can heart disease. A. lead to B. due to C. causes D. create 11 A lot of fish has died recently because of the ………….. water in this lake. A. contaminate B. contaminated C. contaminating D. contaminant 12 Radioactive pollution is increasing the increased use of radioactivity. A. since B. because C. as D. because of 13 Ships spill oil in oceans and rivers. This leads ………….. the death of many aquatic animals and plants. A. to B. from C. at D. in 14 All the aquatic plants and animals will die if the factory ………….. dumping poison into the lake. A. to keep B. kept C. keeps D. will keep 15 .………….. loss can be caused by noise pollution. A. listening B. audio C. sound D. hearing 16 Choose the word that has a different stress pattern from the others. A. natural B. arrival C. physical D. national 17 Choose the word whose underlined part differs from the other three in pronunciation in the following question. A. treatment B. earplug C. fear D. hearing 18 “Here’s my phone number”. “Thanks. I’ll give you a call if I some help tomorrow” A. need B. would need C. will need D. needed 19 Find the word which has underlined part differs from the other three in pronunciation in the following question. A. feather B. measure C. algea D. leather 20 Stress pattern . A. medical B. chemical C. informal D. national