请教三道语法题其中有一道“黄一“失效了？

wanghui1015

问语法题另戴教主的黄金规则一失效了？

2003年1月语法
2. By using their trunks, elephants can tell the shape of an object and ........ is rough or smooth, or hot or cold.
(A) it
(B) whether it
(C) how
(D) since it
这道题黄金规则一失效了？戴云教主如何解释？

2003年8月语法
7．        Living organisms contain more water _________ substance.
(A)        than do any other
(B)        does than any other
(C)        other than do they any
(D)        than they do any other

11．        In jazz music, a riff is a simple melodic figure, _________ and repeated several times.
(A)        usually one or two measures lasted
(B)        lasted one measure or two usually
(C)        is lasting one or two measures usually
(D)        usually lasting one or two measures