Question

1 these are the rules;you can act__or you have to leave the

Answer 1

1B,A是正常的,B是立刻（采取某种行动等）C是因此,D是快速的（指时间短或动作快)

2省略DO,惯例,没什么好解释的

3、B固定搭配advise sb.to do sth.;suggest sb.doing sth.;

persuade sb.to do sth.表示劝某人做某事且他/她听从了劝告,与本句不符合；advise则与结果无关.