英语语法单项选择题,急！！！要解析，谢谢了！！！

Question

The traditional pattern of classroom teaching at the colleges and universities（ ）the professor and a group of 20 to 30 students together for a 50-minute class two or three times a week.
A.bring B.bringing C.brings D.have brought

Answer 1

The traditional pattern of classroom teaching at the colleges and universities（ ）the professor and a group of 20 to 30 students together for a 50-minute class two or three times a week.
A.bring B.bringing C.brings D.have brought
答：C
析：本题考主谓一致。如果能找到主语，就一下子做出来了。
此句简化一下就是sth. brings A and B together for C
sth. = the traditional pattern of classroom teaching at the colleges and universities
为主语，其中the colleges and universities是陷井，专门为那些目光短浅者准备的。真主实际上是the traditional pattern of classroom teaching （大专院校的）传统教学模式
译：大专院校的传统教学模式 将教授和二、三十个学生聚在一起，一周上二、三次50分钟的课。

Answer 2

C.
主语是The traditional pattern of classroom teaching
缺的是谓语，A和D都是要接复数的，而B不能独立做谓语
所以只有C对

Answer 3

C
因为本句主语其实就是pattern 在据总并没有明确时间表示，所以一般是选择一般现在时或者一般过去时，根据选项是一般现在时。pattern是单数，所以加单三。为C项

Answer 4

brings... 一般现在时，traditional pattern 做主语，所以用三单

Answer 5

答案是C
因为时间状语是two or three times a week，因此要用一般现在时

Answer 6

The traditional pattern of classroom teaching at the colleges and universities这是主语，要填的是一个谓语，再根据具体情况分析，应该是现在完成时吧，所以应该选D。。