170。 Because the financial review covered only the last few fiscal years, and therefore the investigators were unable to determine the extent to possible earlier overpayments.

(A) and therefore the investigators were unable to determine the extent to possible

(B) so therefore the investigators were not capable of determining the possible extent of

(C) therefore the investigators were unable to determine the possible extent of

(D) the investigators were not capable of determining the possible extent of（E）

(E) the investigators were unable to determine the extent of possible

如果把C 中的possible 的位置换为 to determine the extent of possible，那这个答案对吗？也就是说because 能和therefore连用吗？

在中文里，“因为”“所以”可以连用。但在英文里，because和therefore是不能连用的。

呵呵。。。是不是题目做得太多，有点做晕头了。。。

谢谢

我发完问题，就知道自己问题的幼稚了

现在经常犯一些蠢错误，以后想好了再发问，呵呵

169.        Because the enemy’s new ship is the quietest and it is therefore the most elusive submarine, it is being increasingly viewed by the military as a threat to security.

(A) and it is therefore the most elusive submarine, it is being increasingly viewed

(B) it is therefore the most elusive of submarines, and it has increased the view

(C) and therefore the most elusive submarine, it is being increasingly viewed

(D) and therefore it is the most elusive of submarines, there is an increasing view（C）

(E) therefore being the most elusive of submarines, it is increasingly viewed

为什么可以同时用BECAUSE 和 THEREFORE？？？

可以同时用BECAUSE 和 THEREFORE么？？？]

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