When you your breakfast this morning? At 6.00.A. have hadB. did haveC. are have D. has

问题补充：

When you your breakfast this morning? At 6.00.

A. have, had

B. did, have

C. are, have

D. has, had

答案：

A. have, had

(答案→)B. did, have

C. are, have

D. has, had

解析：因为have是行为动词，变成一般疑问句时，要借助于助动词do/does/did，故选B