Nearly 56 percent of Chinese believe that traffic order got even worse after tightened traffic regulations ______at the beginning of 2013.
A．have been adoptedB．were adopted
C．a(chǎn)doptedD．had adopted
B

試題分析：句意：自2013年初實(shí)施強(qiáng)化交通規(guī)則后，將近56%的中國(guó)人認(rèn)為交通秩序變得很糟糕。。traffic
Regulations和adopt是被動(dòng)關(guān)系，所以排除CD，而時(shí)間是2013年初，用一般過去式的被動(dòng)語(yǔ)態(tài)，所以選B。
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