根据所给中文意思完成句子，每空限填一词。
【小题1】我们在学校学到了很多有用的东西。
We have learnt a lot of useful things ________ ________.
【小题2】我发现写一个与你关系很近的人很难。
I found it difficult to ________ ________ someone close to you.
【小题3】五·一节即将到来，我们都很激动开始倒计时。
May Day is coming and we are all excited to start to ________ ________ the days.
【小题4】土星是太阳系中的第二大行星。
Saturn is the second biggest planet in the ________ ________.
【小题5】到达山顶的时候很多人感到不舒服。
Many people ________ ________ when they reached the top of the high mountain.