(2013·宁夏银川一中高三第四次考试)________ scores of times, but he still couldn’t understand it

What’s that— _____is a jacket.

How dangerous it was!—Yes，but for the young man’s quick action，he_________ run over by the car．

be late for school next time,______—______.

Modern science has given clear evidence ______ smokingcan lead to many diseases