根据句意，在答题卷标有题号的横线上，写出括号内所给单词的适当形式。
The shoes are very nice. I want to buy ___________ (they).
The new iPhone 5S must be someone ___________ (else). It isn’t hers.
Which lesson do you like ___________ (well), Chinese, English or Maths?
We can keep __________ (diary) every day. It’s interesting.
On the ___________ (one) day, he does some homework.