Question

Fill in the blank with the most suitable option:
_______ it is a nice day tomorrow, we can go swimming.

• A. If
• B. Until
• C. When
• D. Before

Answer 1

Answer: (A)

If

Answer : A

Subordinating Conjugation : It is a word or phrase used to link a dependent clause to an independent clause.

It is used to:

• show a cause-and-effect relationship between the dependent & subordinate (independent clause)
  
• to show a relationship involving a transition of time or place between two clause

Let's take a look at the usage of the subordinating conjugations in the options in relation to condition:

• if : It is used to express a condition that is necessary in order for something to happen; basically to introduce a conditional clause
• until : It is not used in condition related sentences but in time related sentences; It is used to express the time when an event or action comes to an end
• when : It is used to refer to a particular time; at or during the time that; also it is used to show that one event happens slightly after another
• before : It is not used in condition related sentences but in time related sentences; It is used to express that one event precedes another

Here in the question, we understand that the speaker is expressing that in case "tomorrow" happens to be a nice day (condition) they can go swimming. As the speaker is expressing a condition, therefore from among the options, 'If' is the most suitable subordinating conjugation to complete the sentence.

Thus, the correct complete sentence is:

If it is a nice day tomorrow, we can go swimming.