I was preparing__the coming contest while my mother was preparing_supper in the kitchenA./,forB.for,/请说明原因

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I was preparing______the coming contest while my mother was preparing_____supper in the kitchen
A./,for
B.for,/
请说明原因

for /

选B

They are preparing_____(go) on a trip to Hainan Island i was I was I was I was I was just还是I just was I was sick.I was ______ home. I was a teacher when I was I was stuck和I was yesterday I was,today I I was born i was just lee I was born in I was just helping .I was just overwelming I Was Wrong 歌词 I Was Alone 歌词 I was wrong,sorry.

I was preparing______the coming contest while my mother was preparing_____supper in the kitchenA./,forB.for,/请说明原因

I was preparing__the coming contest while my mother was preparing_supper in the kitchenA./,forB.for,/请说明原因