要是没人来参加聚会怎么办?____ ____ no one comes to the part?

题目

要是没人来参加聚会怎么办?____ ____ no one comes to the part?
bring,know,doesn't,a,I,he,him,will,if,present（连词成句）
I would 「trave around the world」 if I had enough time and money（对括弧部分提问）
____ ____ you ____ if you had enough time and money?
Dave doesn't know what he should say at the class meeting （改为同义句）
Dave doesn't know ____ ____ ____ at the class meeting.

答案

What if no one comes to the party?如果没人来参加聚会怎么办?
He doesn't know if i will bring him a present.他不知道我会不会给他带礼物.
What would you do if you had enough time and money?你如果有充足的时间和金钱你会干什么?
Dave doesn't know what to say at the class meeting.大卫不知道在班会上说什么.