—I drove to Zhuhai for the air show last week. —Is that _______ you had a few days off？( )
A.why
B.when
C.what
D.whether
正确答案是D
—I drove to Zhuhai for the air show last week. —Is that _______ you had a few days off？( )
A.why
B.when
C.what
D.whether
正确答案是D