1 . Don't________ the drug ________on animals.
不要在动物身，上试验这种药。

2 . 不要让婴儿暴露在强烈的阳光下。这对他们的皮肤有害。
Do not   ___________ babies   ___________   strong sunlight. It's harmful to their skin.

3 . 不要在动物身上试验这种药。
Don't ___________ the drug ___________ on animals.

4 . - John, where are the cookies? Don't tell me you ate them all.
-___________. I couldn't help it. They were so good.

A．Yes, I did

B．No, I didn't

C．Yes, I have

D．Why? Sound strange