Question

______their help, we wouldn’t have succeeded.

A. Hadn’t been for B. Had it not been for C. It hadn’t been for D. Hadn’t it been for

Answer 1

原句是：if
it
had
not
been
for
their
help,we
wouldn't
have
succeeded.
if
it
had可以改为had的倒装句，意思是一样的。
如果不是他们的帮忙，我们也不可能成功。
希望能帮到你，祝你成功。

Answer 2

B
对过去的虚拟，从句用
过去完成时
，主句用would
/could
have
done
Had
it
not
been
for
是倒装
语序还原If
it
had
not
been
for
your
help,