How to use "aloud" in a sentence

Leaning against a tree, she cried aloud:

'Rebecca.' I had said it aloud.

"Think positive," she said aloud

When I wondered aloud how any vehicle could negotiate this surface, my question was not understood

I passed him one of the letters and he read it aloud.

Had I spoken my thought aloud? I turned, and the door to the garden was open behind me