What time is it? 几点钟了？

1.How many sisters and brothers do you have?  你有几个姊妹和兄弟？ 
2. What time is it? 几点钟了？ 
3. It is two o’clock. 两点钟。 
4. Excuse me. Can you tell me the correct time? 对不起，你能告诉我一下准确的时间吗？ 
5. I have no idea.  我也不知道。