the teacher required all the students-------- in the front of the building which required-------by the end of the year.
A. gather, pulling down B. gathered, pulling down
C. gather,being pulled down D. would gather, pulled down
正确答案是什么 为什么 第二空我知道requird doing sth 意思是需要被做 所以应该在A,B两项里选择
但require 后不是应该加不定式 to do 吗 为什么选项里都没有 请解释 谢谢！
require 后面加从句时，用should +动词原形，should 可以省略，所以是A,
the teacher required all the students (should) gather in the front of the building...
如：require that后面的谓语是原形
Some applications require that certain requests be processed in a particular order.
一些应用程序要求按照特定顺序来处理某些请求。
Some now require that guests check in at the office or have more guards on duty.
一些学校要求客人们在办公室要进行登记，或者有更多的保安执勤。
the teacher required all the students (should) gather in the front of the building...
如：require that后面的谓语是原形
Some applications require that certain requests be processed in a particular order.
一些应用程序要求按照特定顺序来处理某些请求。
Some now require that guests check in at the office or have more guards on duty.
一些学校要求客人们在办公室要进行登记，或者有更多的保安执勤。
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