Fill in the Blanks

The word 'American' begins with a vowel sound, so the indefinite article 'an' is used.

The word 'hour' begins with a silent 'h', creating a vowel sound, so the indefinite article 'an' is used.

Superlative adjectives, such as 'highest', are preceded by the definite article 'the'.

The phrase 'out of' is the correct prepositional construction to indicate leaving a place.

The word 'Russian' begins with a consonant sound, so the indefinite article 'a' is used.

The word 'small' begins with a consonant sound, so the indefinite article 'a' is required. 'An' is used before vowel sounds, and 'the' is used for specific nouns.

The structure 'too + adjective + to + verb' is used to indicate an excessive degree that prevents an action. 'So' would require a 'that' clause (e.g., 'so weak that she cannot walk').

The infinitive form 'to sleep' is the correct construction following the verb 'going' in this context. The other prepositions do not fit the idiomatic usage of going to perform an action.

The preposition 'for' is used to denote a duration of time. 'Since' is used for a specific point in time, and 'till' indicates an endpoint.

When using 'neither... nor', the verb must agree with the subject closest to it. Since 'Ramesh' is singular, the verb must be the singular form 'plays'.

The subject 'These pictures' is plural, so the verb must be the plural form 'are'. 'Is' is singular and would not agree with the subject.

In a polite request starting with a blank, 'Will' is the standard auxiliary verb used. 'Shall' is less common in this specific interrogative structure for requests.

The conjunction 'lest' is grammatically followed by the modal verb 'should'. This is a fixed grammatical rule in English.

The passive voice construction requires the past participle 'known' to follow the verb 'is'. 'Knew' and 'know' are active forms that do not fit the structure.

The word 'news' is treated as an uncountable singular noun in English. Therefore, it requires the singular verb 'is'.