I am not a fan of the way the transitive/intransitive pairs grammar point works. There are a couple of issues.
First, and I think this has been mentioned before, is that the paradigm is different to the way much of Bunpro works. A verb is presented that is not actually part of the answer.
Second, and for me this is the bigger issue, is that it is not really a grammar question, but more of a vocabulary question since it relies on the user having already studied the particular pair presented in the question. Some have suggested providing both the transitive and intransitive verbs, which is better, but it would still essentially be a vocabulary problem. The user would still have had to study both verbs.
The only way I can think to make it a purely grammatical question is to provide the user both the transitive and intransitive verbs, and tell them which is which. Obviously, in this situation, there wouldn’t be a hint as to which one should be used in the sentence. This way, the user has to read the sentence and use context clues to determine which verb completes it. Here is an example of what I am trying to convey:
I found the bag I was looking for.
In this sentence, the answer has to be 見つけた because bag is a direct object. This does mean that some of the current example sentences aren’t sufficient since the sentences need to have enough context in them to make it clear which is the correct verb to use.