問題詳情：
根據句意及首字母提示補全單詞。
1.W_________ is your birthday?
2. We have an art f_________ every year.
3．—H_________ birthday! —Thank you.
4. We have a school t_________ on Tuesday.
5.—How o_________ are you? —I'm 13.
【回答】
1. When ival y 5. old
知識點：單詞拼寫
題型：完成句子
