请问两道语法题 PP test1 & 200405

PP test1:

19.Because Mars is farer from the Sun than_______, Mars takes longer to complete a revolution.

A.      Earth is

B.      is from Earth

C.      what is Earth

D.     is it Earth

The correct answer is A.

200405:

2. Genetically, the chimpanzee is more similar to humans _______.

A.      are than any other animal

B.      than is any other animal

C.      any other animal is

D.     and any other animal is

The correct answer is B. According to the answer above, why is C not correct answer?.

more.. than.. 比较结构，than后面的句子可以倒装也可以不倒装,可以省略相同谓语。

有more就要有than，第二题C没有than，比较形式不完全,句子不成立。