1.Eating too much fat can ( )heart disease and cause high blood preasure.
A.contribute to B.attribute to C.attend to D.devote to
2.All the tasks ( ) ahead of time,they decided to go on holiday for a week.
A.had been foifilled B.were fulfilled C.having been fulfilled D.been fulfilled
3.( ) in the United States,St.Louis has now become the 24th largest city.
A.The fourth biggesst city it was B.Once the forth biggest city
C.Being the fourth biggest city D.It was once the fourth biggest city
理由 答案是ACB