1.---Were all the toys for the children carried to their new kindergarten?
-----No,( )only some of them.
a.it was
b.they were
c.there were
d.there was
为什么选Ａ？
2.There is a possibility that these anaimals
could be frightened,( )a sudden loud noise.
a.being there
b.should there be
c.there was
d.there having been
为什么选Ｂ？详细的解释一下．谢谢！

1.---Were all the toys for the children carried to their new kindergarten?
-----No,( )only some of them.
a.it was
b.they were
c.there were
d.there was
为什么选Ａ？

这句话可以这么回答：
No, only some of them were carried to their new kindergarten.
但答案中没有这一项，所以只能选A，强调句的省略形式。补全就是：No, it was only some of them (that were carried to their new kindergarten).

楼上说“it指代上面所说的已经搬过去这件事中的玩具”是错的。

2.There is a possibility that these anaimals could be frightened,( )a sudden loud noise.
a.being there
b.should there be
c.there was
d.there having been

虚拟语气。
if不省略，should不提前时这么讲：There is a possibility that these anaimals could be frightened, if there should be a sudden loud noise.
此处去掉if，should提前，就是B项。