题目内容：

SAT 改错
the reson first novels are so often their writers' best work [is that it draws upon] all the experiences of childhood.
A.同上
B.is that these first efforts draw upon
C.is becuase of these first efforts drawing from
D.is because of them drawing upon
E.is their drawing from
为什么选B

优质解答

the reason first novels are so often their writers' best wokr 这句话里the reason 是主语,而后面的first novels are so often their writers' best work 是同位语,其实省略了一个that,你可以去看一下同位语从句...