When ___you _____ your breakfast this morning? At 6.00.
A．have, hadB．did, haveC．a(chǎn)re, have D．has, had
B
因?yàn)閔ave是行為動(dòng)詞，變成一般疑問(wèn)句時(shí)，要借助于助動(dòng)詞do/does/did，故選B
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