1.-Did Jack come back early last night?

1.-Did Jack come back early last night?
-Yes.It was not yet eight o'clock _____ he arrived home.
A.when B.until.
为什么选A不选B.NOT UNTIL句型阿.是不是和前面那个YES有关?
2.In our childhood,we were often _______ by Grandma to pay attention to our table manners.
A.demanded B.reminded
为什么选B不选A.
3._________ the new school life,she will soon leave her parents for BEIJING _______.
A.Prepared for;for the first time
B.Having prepared for;the first time
为什么选A不选B?.还有.后面是将来时,前面的主句可以是现在式吗?...
4.Taking this kind of medicine,if ____ ,will surely produce side effect.
A.continue B.continued
为什么选a不选b?
这个不是省略了.if you continue 里面的you么?
no no no
最后一个题答案是选的是b
看来答案又错了...