He began to learn the accordion at the age offour.(选出与画线部分意思相同的选项)[ ]

You’re＿＿＿＿＿your time trying to persuade him. He’ll never join us.

Are these your rulers? – Yes, ________.

My stomach feels terrible, I think I ate ___________ at lunch time.

In our school ________ students can search the Internet for useful information now.