单选题 A: We can make it 7 p.m.
B: ______.
A. I've no idea how long it lasts.
B. Are you sure of its make?
C. Actually 7 " 30 would be better.
D. Why, it's very early.

【正确答案】 C
【答案解析】[解析] 朋友间的对话，此句应对前面提出的时间方面的建议。A、B适用语境不同；D 显得过于生硬。