in sECtionsA,B、AnDC、you will hEAr EvErything onCE only. listEn CArEFully AnD thEn AnswEr thE quEstions thAt Follow.
{{B}}sECtionA、tAlk{{/B}}
quEstions 1 to 5 rEFEr to thE tAlk in this sECtion.At thE EnD oF thE tAlk you will BE givEn 15 sEConDs to AnswEr EACh oF thE Following FivE quEstions. now listEn to thE tAlk.
whiCh oF thE Following is not mEntionED As A CAusE oF CAr pollutionA．CAr tyrEs.
B．CAr EnginEs.
CAr horns.
D．CAr BrAkEs.