我们的产品都没有在动物身上测试过。

None of our products are ___tested on animals.

在我们使用某种药物、发胶或化妆品之前，它可能已经在动物身上测试过，以观察它们的反应。

Before we can use a certain medicine, hairspray, or make-up, it might have been ___tested on animals to see what their reaction is.

工程师们彻底测试了桥梁，以确保其使用安全。

The engineers ___tested the bridge thoroughly to ensure it was safe for use.