Which sentence correctly uses the subjunctive mood?
答案解析
**Core concept**: Grammar - subjunctive mood structure.
**Analysis**: Option C uses 'Were...would' correctly for hypothetical situations.
- **A** incorrectly uses 'was' instead of 'were'.
- **B** uses indicative 'is' instead of subjunctive 'be'.
- **D** misuses future tense 'will'.
**Key point**: Subjunctive requires 'were' + base verb form for hypotheticals.
正确答案:C