10. 初中语法选择题1道（求详解，越详细越好~）

Question

John was given the same suitcase his father and grandfather ( ) with them to school.
a. took
b. had taken
c. were taking
d. would take

Answer 1

意思是约翰被给了一个行李箱，他父亲和祖父都曾带过这个箱子去上学。（定语从句：take的宾语为 the same suitcase）
“父亲和祖父带这一箱子去上学”这件事必然发生在“给约翰箱子”这件事之前，过去之过去应用过去完成时。