Question

Fill in the blank with a suitable verb:
If you've got a ticket, you __________ queue. You can go straight in.

• A. ought to
• B. don't have to
• C. have to
• D. should

Answer 1

The correct option is B don't have to

Answer : B

Let's take a look at the usage of the modal verbs in the options:

• ought to : 'ought to' is a synonym for 'should'; it is more formal than 'should' and is less commonly used, particularly in the question form
• don't have to : It is the negative form of 'have to; used to express elimination of a obligation
• have to : It is used to express an external obligation in positive sentences and removing an external obligation (or necessity) in the negative sentences
• should : It is used for expressing an opinion / advice / expectation / criticism about some past action or it can be used to ask for an advice

Here in the question, we see that the speaker is expressing that they can go straight in, which implies that they don't have to wait in the queue. So basically, the speaker here is eliminating the obligation to wait.

• As the speaker is not expressing a necessity -- 'ought to' & 'should' are not suitable here.
• As it is not an obligation -- 'have to' is not suitable here.

Therefore from among the options, 'should' is the most suitable verb to complete the sentence.

Thus, the correct complete sentence is:

If you've got a ticket, you don't have to wait. You can go straight in.