１. Once the economic and social usefulness of the motor car was demonstrated and with its superiority to the horse being proved ,much of the early hostility to it in rural regions disappeared.
A and with its superiority to the horse being
B and its superiority over the horse had been
C and its superiority to the horse
The anwser is B.
２.Despite protests from some waste-disposal companies,state health official have ordered the levels of bacteria in seawater at popular beaches to be measured and that the results be published.
A the levels of bacteria in seawater at popular beaches to be measured and that the results be
B that the levels of bacteria in seawater at popular beaches be measured and the results
The anwser is B
关与并列句的省略：如果第一句中有be 或者become,第二句中的be或 become必须省略．
在q２中，that the levels of bacteria in seawater at popular beaches be measured and the results（be)published,省略的be
在q1 中 and its superiority to the horse（be）proved.这样为什么不对？ | 
