1沒有人知道那個(gè)孩子是如何來到這里（athough）
Although the child is here,no one knows how did he arrive
2 他告訴你為什么遲到了嗎（why）
Did he tell you why he was late?
3我不知道誰先上的公共汽車(who）
I do not know who get onto the public bus first.
4因?yàn)殍€匙丟了,所以我只好在門口等爸爸回來（because)
Because I lost my keys,I have to wait for my father at the door.
5如果你明天有時(shí)間的話,就到我辦公室來一趟吧（if）
If you have any time tomorrow,please come to my office.
6我沒有告訴他我什么時(shí)候到上海的.（when）
I have not told him when did I arrive Shanghai.