Vault seed record
Interested in joining 2
In a workplace mini-scenario, Complete the pattern: Are you interested ___ joining the call?
Classification
Provenance
Kind: human-authored
Source: reviewed-expansion-anchor-pack
Batch: reviewed-expansion-core-grammar-control-2026-05
Reviewer: content-lead
Updated: 2026-05-21
Instruction and answer
Instruction
Choose the best answer.
Correct answer
in
Explanation
Interested is followed by in plus a noun or -ing form.
Product use
Surfaces
Source languages
Difficulty
medium
Conversion hook
Fixed adjective patterns separate fluent users from guessers.
Review payload
Review notes
Approved seed anchor from the reviewed expansion pack. Used to close family coverage gaps before scaled promotion.
Media prompt
No media prompt attached.
Assets
Source traps
Tags
Usage
Tests: grammar-diagnostic, general-english-level, error-detection
Funnels: general-level-assessment
Challenges: grammar-anchor-23
{
"type": "single-choice",
"correctOptionId": "in",
"options": [
{
"id": "in",
"label": "in",
"rationale": "This is the defensible answer in the context."
},
{
"id": "on",
"label": "on",
"rationale": "This distractor reflects a common learner mistake."
},
{
"id": "for",
"label": "for",
"rationale": "This distractor reflects a common learner mistake."
},
{
"id": "to",
"label": "to",
"rationale": "This distractor reflects a common learner mistake."
}
]
}