Thegovernmentcalledoutpolicementosuppresstheriot.
A、政府派警察镇压动乱。A
to suppress the riot 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。
Heshookhandswiththevisitors________astoconveyhisapology.
IntheU.K.,theQueen'sSilverJubileeisin_______.
Shewas________beunabletospeak
Thegirlwasluckyenoughto_______thebadmenandranaway.
Touristexpenditureshavedifferenteffectsonadestinationeconomy:salesbyfoodvendorstorestaurantsare_______effect;whiletaxifaresandairlineticketsalesare_______effect.
