我放下电话后才意识到忘了问他的名字。

I realized I had forgotten to ask his name after I ___put ___down the phone.

“我现在不能说话，”她说着快速放下了手机。

"I can't talk now," she said and quickly ___put ___down the cell phone.

那个电话让人非常沮丧，他不得不放下听筒，深吸一口气。

The call was so upsetting that he had to ___put it ___down and take a deep breath.