Modals: They are verbs which are used before the main verb to express ability, possibility, obligation, permission, suggestion, request, certainty or necessity.They indicate the attitude, intention and the mood of the speaker.

• They cannot be used alone in a sentence.
• In case of Questions they are used alone.
• They are not affected by the change in person i.e. first, second or third form.
• Present Participle or Past Participle form of a verb is never used with a modal.

Use of Will:

1. The use of will in second and third person denotes pure future actions, With first person, will denotes threat, warning, promise or determination. e.g.

    (a) He will go tomorrow.

Will is also used for formal request.

    e.g. Will you close the door?

In the question : -

1. She ______ study harder for the next exam .

In this sentence , will is the correct modal that can be placed in the blank part as it is used to show that you are definitely planning on doing the action – and it’s not just a suggestion, so only use it when you mean it!

2. I ________ catch the bus to work .

In this sentence , will is the correct modal that can be placed in the blank part as it is used to show a decision that you’re going do take an action that is going to happen immediately or soon, you can use “will” to describe this.

Thus , the Correct Option is C , which is will , will .

Modals: They are verbs which are used before the main verb to express ability, possibility, obligation, permission, suggestion, request, certainty or necessity.They indicate the attitude, intention and the mood of the speaker.

• They cannot be used alone in a sentence.
• In case of Questions they are used alone.
• They are not affected by the change in person i.e. first, second or third form.
• Present Participle or Past Participle form of a verb is never used with a modal.

Use of Will:

1. The use of will in second and third person denotes pure future actions, With first person, will denotes threat, warning, promise or determination. e.g.

    (a) He will go tomorrow.

Will is also used for formal request.

    e.g. Will you close the door?

In the question : -

1. All the cadets __________ attend the parade.

In this sentence , will is the correct modal that can be placed in the blank part as it is used to show commands and instructions.

2. He _________ not sanction your leave.

In this sentence , will is the correct modal that can be placed in the blank part as it is used to show probability with all the persons. The negative form, will not (wont) denotes refusal.

3.  I ___________ pay you on Monday .

In this sentence , will is the correct modal that can be placed in the blank part as it is used  denotes pure future actions, With first person, will denotes threat, warning, promise or determination.

Thus , the Correct Option is B , which is will , will , will .

Modals: They are verbs which are used before the main verb to express ability, possibility, obligation, permission, suggestion, request, certainty or necessity.They indicate the attitude, intention and the mood of the speaker.

• They cannot be used alone in a sentence.
• In case of Questions they are used alone.
• They are not affected by the change in person i.e. first, second or third form.
• Present Participle or Past Participle form of a verb is never used with a modal.

Use of Will:

1. The use of will in second and third person denotes pure future actions, With first person, will denotes threat, warning, promise or determination. e.g.

    (a) He will go tomorrow.

Will is also used for formal request.

    e.g. Will you close the door?

In the question : -

1. “I ______  have to say goodbye if I don’t go to the airport.”

In this sentence , won't is the correct modal that can be placed in the blank part as it is used to show an expected hypothetical outcome.

2. This darn washing machine _________  turn on.

In this sentence , won't is the correct modal that can be placed in the blank part as it is used to show express or inquire about a person or thing’s ability or willingness to do something.

3. This house ______ not be used as a hotel for your friends, do you understand me?

In this sentence , will is the correct modal that can be placed in the blank part as it is used to show a certainty that the command will be obeyed.

Thus , the Correct Option is B , which is won't , won't , will .