三个英语单选题----高手进1、The necklace that I had showed to my friends

三个英语单选题----高手进
1、The necklace that I had showed to my friends _____ .It made us very sad.
A：was lost B：gets lost C：were missing D：was missed
2、—_____ you _____ breakfast?
—Yes.I had it at 6:30.
A：Had；Had B：Have；had C：Are；having D：Were；having
3、Many people welcome the "Harm-free Internet",but what do many school students _____ it?
A：hear of B：think of C：look over D：talk about
你们的答案正确，但第一个问题的解释没有一人是正确的。所以我不能选你们的解释。