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B. were walking
C. walked
D. to walk
While _________ the dog, you were careless and it got loose and was hit by a car．
walked
was walking
being walked
walking
观察下列句子，试着归纳其画线部分所包含的句型结构。
1．While walking the dog, you were careless and it got loose and was hit by a car．(P1, 4)
______________________________
2．You will tell him/her that he/she should have studied, so you don’t let him/her look at your paper．(P1, 5)
______________________________
3．…but your friend can’t go until he/she finishes cleaning the bicycle．(P1, Warming Up 1)
______________________________
观察下列句子，试着归纳其画线部分所包含的句型结构。
1．…he/she broke it and you had to pay to get it repaired．
______________________
2．While walking the dog, you were careless and it got loose and was hit by a car．
______________________
3．I wonder if it’s because I haven’t been able to be outdoors for so long that I’ve grown so crazy about everything to do with nature．
______________________
4．Mother asked her if/whether she was very hot with so many clothes on．
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