'The clock has struck five.' is a complete sentence and hence 'none of se' is correct answer.

'talk back' is a phrasal verb of talk which means reply defiantly or insolently.

With singular noun 'she' singular verb 'reaches' will be used. 'reach' is plural verb, 'reaching' is used for continuous tense and 'reached' is used for past tense.

I have good news for you is correct. Since news is a uncountable noun, it would not take indefinite article 'a'.

If noun is singular, use 'is'. If it is plural or re is more than one noun, use 'are'.'They' is a plural noun.

The word 'whose' is possessive form of pronoun 'who'. It is used in questions to ask who owns something, has something, etc. 'Who' becomes 'whose' just like he and she becomes his and her.

We use little with uncountable nouns. We use few with plural countable nouns.
They are used in formal contexts:
I’m not very happy about it but I suppose I have little choice.
Few cities anywhere in Europe can match cultural richness of Berlin.

Sentence is in past continuous tense in passive voice.
Rule :
Subject + was/were + being + V³ + or agents.
The swimming pool was being repaired at 9 o’clock yesterday.

According to -- as stated by.
Because of -- on account of; by reason of.
Inspite of -- even though.
Though -- despite fact that; although.
According to me, you should read English newspapers daily.

The word 'us' is used to convey a person or a group of people.
Any or word would have created a sentence that doesn't mean anything or is grammatically incorrect.