问题
选择题
There is no need to leave a tip in Canada. Service ________ in the bill.
A．included
B．is included
C．includes
D．was included
答案
答案：B
题目分析：句意：在加拿大没有必要留下小费。服务被包含在账单里面。这里的service和include是被动关系，而且讲的是客观事实，所以用一般现在时的被动，选B。