单选题 ______ wasn't his opinion that the company picnic should be postponed because it looked like rain.
A. They
B. Its
C. There
D. It

【正确答案】 D

【答案解析】中级问题首先，空格内应当填入的是主语，所以排除副词there。再判断单复数，排除they。在剩下的it和its中间选择，因为后面有that引导的从句，所以应该选择it做形式主语。its是所有格，不能做句子的主语。