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 Shall:

1. The use of shall in first person denotes a pure future action, while use of shall in second and third persons denotes; promise. determination, threat, or warning. e.g.

    (a) I shall go to market tomorrow. (future action)

In the question : -

1. This time next week I _________ be in Scotland.

In this sentence , shall is the correct modal that can be placed in the blank part as it is used for talking about or predicting the future .

2. ___________ I send you the book ?

In this sentence , shall is the correct modal that can be placed in the blank part as it is used for making offers or suggestions or asking advice .

3. Let's look at it again, __________ we ?

In this sentence , shall is the correct modal that can be placed in the blank part as it is used for making offers or suggestions or asking advice .

Thus , the Correct Option is C , which is 1. Shall 2. Shall 3. Shall .

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 Shall:

1. The use of shall in first person denotes a pure future action, while use of shall in second and third persons denotes; promise. determination, threat, or warning. e.g.

    (a) I shall go to market tomorrow. (future action)

In the question : -

1. I'm afraid Mr. Smith ____________ become our new director .

In this sentence , shall is the correct modal that can be placed in the blank part as it is used to denotes inevitability .

2. He _________ become our next king .

In this sentence , shall is the correct modal that can be placed in the blank part as it is used  to denotes predestination .

Thus , the Correct Option is B , which is 1. Shall 2. Shall .

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 Shall:

1. The use of shall in first person denotes a pure future action, while use of shall in second and third persons denotes; promise. determination, threat, or warning. e.g.

    (a) I shall go to market tomorrow. (future action)

In the question : -

1. At what time ________ we meet ?

In this sentence , shall is the correct modal that can be placed in the blank part as it is used to indicate that we are going to do something or intend to do something in the future .

2. We ______________ visit John on vacation day .

In this sentence , shall is the correct modal that can be placed in the blank part as it is used to indicate that we are going to do something or intend to do something in the future .

3. They ____________ become disbanded .

In this sentence , shall is the correct modal that can be placed in the blank part as it is used to show certainty, determination or conviction.

Thus , the Correct Option is D , which is 1. Shall 2. Shall 3. Shall .