几道英语题不会求详解

We insist___your answer tonight______
to have...at the latest
on having...at the latest
in having...at the latest

The picture was sold for a great____of money
A.cost
B.sum
C.value
D.price

详细解析一下这四个词，谢谢。

He promised to mend the broken wheel next day without_____.
A.fall
B.default
C.trouble
D.fail

No one was able to explain the____of the old custom.
A.beginning
B.origin
C.start point
D.reason

为什么选B不选D？

I suddenly _____that I had left my purse at home
A.succeeded
B.managed
为什么不选A要选B呢？
No one was in the car crash
A.damaged
B.injured
C.suffered
D.wounded
请解析这四个词有何区别。

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