Question

A board ________ by the side of the well on which these words ________ ,“Danger．Keep off!”

1. A.
   set up; wrote
2. B.
   put up; wrote
3. C.
   was put up; is written
4. D.
   was set up; were written

Answer 1

D
解析：
因定语从句中words为复数，故C项错误。