请根据句意从方框中选择合适的动词，并用其适当时态填空，使句子通顺。

promise     hold   discover     reply      visit

 
She         just_    _ that people in the west have 12 star signs.
My father ______ to celebrate my birthday with me several times but never did it.
If I have time, I       my grandparents in the countryside this weekend.
My penfriend          to my e-mail every week.
一Can you hear some students singing in the hall?
一Yes. Our school _________ a red-song competition there.