补充题3-58

58.   Cartographers have long struggled with the problem of having the spherical Earth to draw on a flat sheet of paper.

(A) having the spherical Earth to draw on a flat sheet of paper

(B) having a flat sheet of paper on which to draw the spherical Earth

(C) how can one draw the spherical Earth on a flat sheet of paper

(D) how they could use a flat sheet of paper to draw the spherical Earth（E）

(E) how to draw the spherical Earth on a flat sheet of paper

按照OG上的说法，of后面只能跟prhase不能跟clause。E我觉得不是一个clause，所以选了。

现在回头来看，C如果把can的语序换了，D把表述换简洁点，似乎也是对的。

我就不明白了，of后面什么时候能跟clasue呢？这里的how引导的句子究竟算不算clause？

C) how can one错, 应正序。
D) use a flat sheet of paper to draw the spherical Earth意思表达不合习惯。

      E是一个带有疑问词的不定式分句，不是个句子，你改动C、D是句子

      不过我不知道OG在哪里说过of后面不能接句子，请小女公子提点