The government called out policemen to suppress the riot.
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。
Which of the following statement is NOT true?
Themissingboyswerelastseen________neartheriver.
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
Hefound_______difficulttostudymaths.
It _______ for two hours now
