Mercury and venus relatively close to the sun, and neither mercury nor venus to support life. which pair of verb forms correctly completes the sentence? are; appears is; appear are; appear is; appears

Mercury and Venus are relatively close to the sun, and neither Mercury nor Venus appears to support life.

Explanation:

Mercury and Venus relatively close to the sun, and neither Mercury nor Venus to support life.

The first blank will be filled by "ARE" for the subjects "Mercury and Venus" is plural. And the second blank will be filled with 'appears' for the subject closest to the verb is a singular noun.

In the first case, the verb will take the form of the two subjects, thus plural so the use of "are". In the second case, the verb is in the singular form for, whenever there is the use of "neither/nor" in a sentence, the verb will take the form of the nearest noun/pronoun to it. Thus, the verb will be according to the noun "Venus", which is singular, thus, 'appears'.

Thus, the final sentence will read as-

(Mercury and Venus) are relatively close to the sun, and neither Mercury nor (Venus) appears to support life.

no its not a run on sentence however i think you meant wet suits not sours also a run on sentence would be like surfers surf all winter long in southern california by using wet sours to keep them warm and the live their all year long  

the pronoun reference replaces a noun, but you have to make sure there's no room for confusion.

in the first sentence "her" could be referring to shely or to the sister. the answer there is "shelly called her sister and told her about the new baby."

in the second sentence "it" could be referring to the roof or the floor. the answer there is "since the roof leaks on the family room floor, we need to repair the roof."