If the rent is as much as $750 a month, water, gas and electricity should______________.
选择一项：
a. be included 解析：如果月租高达750美元，应该把水、电、煤气都包含在内。本题考查被动语态。主句中的主语water, gas and electricity与include之间是被动关系，因此用被动语态should be included。
b. inclusive
c. have included
d. include