1.You can't have this football back () you promise not to ki

1.You can't have this football back () you promise not to kick it at my cat again." the old man said angrily.
A.because B.since C.when D.until这道题翻译成中文什么意思,为什么选D
2.I can't still understand the passage () there are few new words in it
A.so B.because C.if D.though这道题翻译成中文什么意思,为什么选D
3.I wonder ().
A.how much cost these shoes B.how much these shoes cost
C.how much do these shoes cost D.how much are these shoes cost
这道题为什么选B呢?
有点繁琐 希望各位能不吝赐教.