The particular design of muscles and bones in the neck and limbs of the turtle allow that it can draw in its exposed parts such that an attacker can find nothing but hard shell to bite.
(A) allow that it can draw in its exposed parts such that
(B) allow it to draw in its exposed parts, and so
(C) allows for it to draw in its exposed parts and that
(D) allows that it can draw in its exposed parts, and so
(E) allows it to draw in its exposed parts, so that
答案没有问题，想知道D的错误，除了and so 没有 so that好。
it指代什么？
对prep的解释有点质疑
and与so都是连词，重复
prep1-95里就出现过了and so是正确答案
Unlike frogs that metamorphose from tadpoles
into
adults
within
a
one-year period, mountain
yellow-legged
frogs
of
the
Sierra
Nevada
take
three
to
four
years
to
reach
adulthood, and so they are restricted
to
deeper bodies
of
water
that
do
not
dry
up
in
summer
or
freeze
solid
in
winter.
另外, 除了allows sb to do sth 较
allow that 简洁外
想请教and so和so that的区别在哪?
不都可以表因果关西吗?
【书】承认[allow+that]
He allowed that they were right. 他承认他们是对的。
同意
我认为解释有错误，and so有很多例子.D的错误只可能是:
【书】承认[allow+that]
He allowed that they were right. 他承认他们是对的
同问，为什么so that前要有逗号？
我觉得D选项：...,and so... 连接的两个句子是主句之间的关系，然而此句的逻辑意思，不是：因为allow所以can find nothing，而是应该是：因为draw 所以 can find nothing，所以不行。
同问，为什么so that前要有逗号？
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