你的生日是什么时候？

___What is the date of your birthday?

你的钱包放在哪里了？

___Where did you put your wallet?

你为什么要买这么贵的手机？

___What made you buy such an expensive phone?

那件挂在墙上的东西是什么？

___What is that thing hanging on the wall?

会议安排在什么地方？

___Where is the meeting scheduled?