david promised to come round to have supper with us todaybut he___,i've been alone for half an houra.wont't b.hadn't c.hasn't d.doesn't原因是什么?

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davidpromisedtocomeroundtohavesupperwithustodaybuthe___,i''vebeenaloneforhalfanhoura.wont''tb.hadn''tc.

david promised to come round to have supper with us todaybut he___,i've been alone for half an houra.wont't b.hadn't c.hasn't d.doesn't原因是什么?
david promised to come round to have supper with us today
but he___,i've been alone for half an hour
a.wont't b.hadn't c.hasn't d.doesn't
原因是什么?

david promised to come round to have supper with us todaybut he___,i've been alone for half an houra.wont't b.hadn't c.hasn't d.doesn't原因是什么?
我觉得选C更合适,but he hasn`t是一个省略句,稍微补充完整的话就是:but he hasn`t come,说话者所指的时间跨度是从戴维答应一直到现在他说话的现在,所以应该使用现在完成时.

选C吧

he promised to — David promised to come round to have supper with us today. — But he ____. I’ve been alone for— David promised to come round to have supper with us today. — But he ____. I’ve been alone for half an hour. A. won’t B. hadn’t C. hasn’ david promised to come round to have supper with us todaybut he___,i've been alone for half an houra.wont't b.hadn't c.hasn't d.doesn't原因是什么? 英语高手请进:david promised to come round to have supper with us today.but he ___.I've been alone for half an hourA.won't B.hadn't C.hasn't D.doesn't — David promised to come round to have supper with us today.— But he ____.I’ve been alone for half an hour.A.won’t B.hadn’t C.hasn’t D.doesn’t 英语翻译Linda and David have traveled by air from London to Sydney,Australia.Linda has promised her mother that she will ring her to let her know that they have arrived safely.This is something she had done ever since she was a child.David thinks Linda and David have traveled by air from London to Sydney,Australia.Linda has promised her mother that she will ring her to let her know that they have arrived safely.This is something she had done ever since she was a child.David thinks it is a goo She promised to come earlier next time That one you promised to be mine he promised to give me a photo 还是 he promised me to give me a photo? My mother made a tellphone call,promised to visit them.用promised还是promising? 一道英语选择题-David promised to come round to have supper with us today.-But he_____.I've been alone for half an hour.A.won'tB.hadn'tC.hasn'tD.doesn't正确答案好象是A,但为什么BD不可以? He promised to come,but actually he didn't a_____. They promised to keep touch with each other. (We'Ll Fly You To The) Promised Land 歌词 he promised not to lie any more对吗 The policemen promised to look into the matter.翻译 I will try to do what I promised是什么意思