The correct answer is: B. happy, arrive
The sentence is about the speaker’s happiness to have someone arrive to make a function a great success. The word “happy” expresses the speaker’s positive feelings about the event, and the word “arrive” indicates that the person is coming to the event.
The other options are not as appropriate. The word “proud” would be more appropriate if the speaker was talking about their own accomplishments, and the word “sure” would be more appropriate if the speaker was confident that the person would arrive. The word “pleased” could be used, but it is not as strong as the word “happy.” The word “wonderful” is too strong, and it does not accurately reflect the speaker’s feelings.
In conclusion, the correct answer is: B. happy, arrive