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】：
因为后面有by，且是动作发出者，所以空格处应该选被动，不选BD，主语为all towns，为复数，所以选were，选A。句意：到1642年，法律要求马萨诸塞殖民地的所有城镇都拥有学校。
By 1642, all towns in the colony of Massachusetts（ ）by law to have schools.
By 1642, all towns in the colony of Massachusetts（ ）by law to have schools.
were required
required
was required
had required
因为后面有by，且是动作发出者，所以空格处应该选被动，不选BD，主语为all towns，为复数，所以选were，选A。句意：到1642年，法律要求马萨诸塞殖民地的所有城镇都拥有学校。