---I drove to Zhuhai for the air show last week.

---Is that the reason ______ you had a few days off?

1. A.
   why
2. B.
   when
3. C.
   what
4. D.
   because

---- I drove to Zhuhai for the air show last week.

---- Is that the reason _______ you had a few days off?

A. why              B. that              C. what                 D. which

I drove to Zhuhai for the air show last week. Is that the reason ____ you had a few days off?

   A. why            B. when           C. what           D. where

—I drove to Zhuhai for the air show last week.

—Is that the reason ________ you had a few days off?

A. why

B. when

C. what

D. where