问题标题：
大学英语单选题1I()mybreakfastwhenthemorningpostcame.AwashavingBhadChadhadDamhaving2“Didyoucheckyourpaper?”“No,I()itnow.”AcheckedBhavecheckedCamcheckingDchecking3It()foraweekandthestreetswerefl
问题描述：
大学英语单选题
1I()mybreakfastwhenthemorningpostcame.
Awashaving
Bhad
Chadhad
Damhaving
2“Didyoucheckyourpaper?”“No,I()itnow.”
Achecked
Bhavechecked
Camchecking
Dchecking
3It()foraweekandthestreetswereflooded.
Awasraining
Bhasbeenraining
Chadrained
Dhadbeenraining
4Healways()withhiswindowsopen.
Aslept
Bsleeps
Cwassleeping
Dhasslept
5Hehardlyever()amistakewhenhewrites.
Amade
Bmakes
Chadmade
Dhasmade
李毓庆回答：
1.I(washaving)mybreakfastwhenthemorningpostcame.选项：Awashaving解析：1）bedoingsth.when表示“某人正做某事,就在这时候出现了另一件瞬间发生的事”,此处的when相当于并列连词的作用,意思是an...
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