Which conjunction best completes this sentence? 'The cascade of change stops ______ people resist the influence.'
答案解析
**Core Concept**: Grammar - Subordinate Clauses.
**Analysis**:
- 'Because' (C) correctly introduces a cause-effect relationship: resistance causes the cascade to stop.
- **Distractors**:
- (A) 'Although' contradicts the logical connection.
- (B) 'Unless' would mean stopping only if people *don’t* resist, reversing the meaning.
- (D) 'Until' suggests a temporal relationship, not causation.
**Key Tip**: Identify whether the clause states a reason (cause) or condition.
正确答案：C