By 1642, all towns in the colony of Massachusetts ______ by law

By 1642, all towns in the colony of Massachusetts ______ by law to have schools.
A、were required
B、required
C、was required
D、had required
【正确答案】：A
【题目解析】：译文：到1642年，马萨诸塞殖民地的所有城市依法必须要有学校。be required to do sth.常常表示根据（法规）规定必须做某事。而且本句主语为all towns，所以选were requiredo答案为A。