Complete the sentences. use the present simple passive of the verbs in brackets. bacteria on your hands are killed (kill) if you wash with just water. twenty-two million schooldays ……………) because of colds in the usa every year. bacteria ………. (not pass) on through food. colds ……… cause) by cold weather. antibiotics ………………. (use) to treat flu. vitamin c …………………. (find) in oranges.