Final answer:
The correct answer is B. must, as it expresses a strong assumption about the person's feelings of excitement for their trip to Germany. 'Must' is the logical choice among the other modal verbs offered.
Step-by-step explanation:
The question is testing your knowledge of modal verbs and their usage. In English, modal verbs are auxiliary verbs that express necessity, possibility, permission, or ability. The sentence 'You___ be really excited about your trip to Germany.' suggests a strong possibility or assumption about the person's feelings regarding the trip. Therefore, the correct answer is B. must, which is used to express a strong assumption or logical conclusion about the present.
Options A, C, and D do not convey the same meaning:
- A. could – Suggests possibility, but not certainty.
- C. have to – Indicates necessity, not personal feelings.
- D. ought – Suggests duty or advisability, not excitement.
The use of modal verbs is essential in conveying the right meaning in English sentences, and choosing the correct modal can change the sentiment or the certainty of a statement. In this case, 'must' appropriately conveys the speaker's belief that the student is very likely feeling excited about the upcoming trip.