Provide the appropriate tense form of the verbs in brackets.

Sandra couldn't _______ (believe) her eyes when she saw the huge tail fin in the lake. Then suddenly she saw the whole body of the fish- except it wasn't a fish. The being had the upper body of a woman. Sandra _______  (stand) behind the tree stunned, unable to believe what she _______ (look) at. "It's a mermaid, Sandy", her little brother who _______ (stand) beside her whispered excitedly. Indeed it was a mermaid, with beautiful golden hair and a blue-green shimmery tail fin instead of legs. Sandra felt as if she was about to _______ (faint).