The government called out policemen to suppress the riot.
A、政府派警察镇压动乱。A
tosuppresstheriot在句子中是作目的状语，表示“警察来是镇压动乱的”，所以答案为A。
Motivationandpersonalitymay________thevaryingdegreesofsuccessinone’scareer.
______alittleearlier,Iwouldhavecaughtthetrain.
IntheU.K.,theQueen'sSilverJubileeisin_______.
Touristexpenditureshavedifferenteffectsonadestinationeconomy:salesbyfoodvendorstorestaurantsare_______effect;whiletaxifaresandairlineticketsalesare_______effect.
Scientistsdoubtwhetherit’s________toregulateone’sbiologicalclockbydrinking.
