Why_you so busy last week?A did B do C was D were

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Why_you so busy last week?A did B do C was D were
Why_you so busy last week?A did B do C was D were

Why_you so busy last week?A did B do C was D were
D
因为busy是形容词,所以,前面不能加助动词did ,do.
did,do 后面必须有谓语动词
“上周你为什么那么忙?”

D were

D
你上周为什么那么忙?
A项用did的话,后面没有动词原形,B项,整个句型为过去时态,用do时态错误,C项,虽为过去时态,与you不能搭配使用。所以排除法选D

D