He said that the twelfth and last lesson _ rather difficult.A、were B、was C、will be D、are

问题描述:

He said that the twelfth and last lesson _ rather difficult.A、were B、was C、will be D、are
请给出答案及解析

一定要注意:the twelfth and last lesson 说的是一课,“第十二课即最后一课”,这是英语里的习惯用法.所以谓语是单数.同意燕子2126的答案.无误!