Correct the following sentences

They all rejected that idea of the Captain's.

= They all rejected the captain's idea."

In formal English, the conjunction "as" is used to introduce a clause or a phrase that indicates a comparison or the manner in which something is done. In this sentence, "as in the old days" describes how the evening was spent, implying "in the way it was done in the old days."

Conversely, "like" is primarily used as a preposition to mean "similar to" or "in the manner of," and is typically followed by a noun, pronoun, or noun phrase. While "like" is often used informally in place of "as" or "as if," it is generally considered incorrect in standard written English when introducing a clause or an adverbial phrase of comparison.

For example:

    
• Incorrect: She sings like she is a professional.
    
• Correct: She sings as if she is a professional.
    
• Correct: She sings like a professional. (Here, 'like' is a preposition followed by a noun phrase 'a professional'.)

Therefore, "as in the old days" is the grammatically correct and more formal choice for this context.

Not all the members were present.

The original sentence, "All the members were not present," is grammatically ambiguous and often considered unidiomatic in standard English. It attempts to express a partial negation, implying that some members were present, but not every single one of them.

To clearly and idiomatically express a partial negation, the word "not" should typically precede "all" or "every." Therefore, "Not all the members were present" is the most straightforward and grammatically preferred way to convey that only some of the members were absent.

If the intended meaning was a complete negation—that is, absolutely zero members were present—the correct phrasing would be different:

    
• None of the members were present.
    
• No members were present.

Understanding and applying such nuances in negation is important for clear and precise communication, particularly in professional contexts relevant to job seekers.

He was accused of a crime he did not commit. 

This boy is good at mathematics.

In English grammar, the verb 'call' can be used in several ways, and its usage dictates whether a preposition is required. When 'call' means 'to telephone someone', it functions as a transitive verb and directly takes an object without any preposition. For example, one would say "Please call Mr. Khan" to mean telephoning him.

Conversely, if 'call' is used to mean 'to pay a brief visit to someone', it typically forms a phrasal verb with the preposition 'on', as in "to call on someone". For instance, "We will call on our neighbours tomorrow."

Given the structure "Please call – Mr. Khan tomorrow morning", the most common and grammatically appropriate interpretation is that Mr. Khan should be telephoned. Therefore, no preposition is needed in the blank, and the sentence correctly reads "Please call Mr. Khan tomorrow morning."