Question

--- How often ________ your school sports meeting ________?

--- Once a year.

1. A.
   does; hold
2. B.
   was; hold
3. C.
   is; held
4. D.
   did; hold

Answer 1

C
注意到：本题主语是your school sports meeting，这是动作hold的承受者，因此谓语动词应使用被动语态；从答语看动词应该使用一般现在时。