The supply of electric power to Madrid and neighboring districts

The supply of electric power to Madrid and neighboring districts has had to be ________
A、weakened
B、omitted
C、restricted
D、lowered
【正确答案】：D
【题目解析】：supply只能和lower搭配表示”降低供应量“而符合句意，weaken指变弱，omit遗漏，省略；restrict约束，制止”。