几道英语选择题.请帮我把每道题分析一下,我对老师说的答案有疑问.1.He ____ his bike so he has

几道英语选择题.
请帮我把每道题分析一下,我对老师说的答案有疑问.
1.He ____ his bike so he has to walk there.
A.lost B.has lost C.had lost D.loses
老师说的D,可是是先丢了车才会步行啊,为什么不是A?
2.I ______ that you_____good care of her that day
A.thought...will take B.thought...would take C.think...will take D.think...take
老师说是C that day不是一般过去时的时间状语吗?那应该选B啊?
3.She___ill so she____ able to go skating the next day
A.is...won't be B.is ...wouldn't be C.was...won't be D.was...wouldn't be
老师：B 我就想知道next day是明天 ,the next day 不是过去某件事的第二天吗?为什么不选D?
4.-----Is Jack on duty today?
-----It___be him.It's his turn tomorrow
A.mustn't B won't C can't D needn't
老师：A 我敢肯定应该选C .must表推测的否定不是用can't 她应该看错了吧- -
5.Oh,I'm not feeling well in the stomach.I____so much fried chinken just now.
A.shouldn't eat B.mustn't have eaten C.shouldn't have eaten D.mustn't eat
老师：B 为什么不能选C呢?不应该吃炸鸡不是更准确吗?