单选题 Tom didn't see the book. I didn't see it, _________.
【正确答案】 B
【答案解析】either用于否定句,表示“也”的意思。而too和also用于肯定句,表示“也”的意思。注意下面两个例句中also和too的位置。You are a student.I'm a student, too.你是学生,我也是学生。He is a teacher.I'm also a teacher.他是老师,我也是老师。also常置于连系动词之后,行为动词之前。