用shrill whistle造句子，“shrill whistle”造句

For us, the slothful spell was broken on our second afternoon by a shrill whistle.

The grandfather stood under the door, watching her, when suddenly a shrill whistle was heard.

Suddenly Heidi, hearing a shrill whistle, rushed outside, as Peter and all his goats came racing down.

Two strong shrill whistles answered through the calm.