The envelope wasn't sealed, so I opened it.

信封没封好，所以我打开了。

youdao

The key had been carefully placed in the lock so I opened it.

书的钥匙已经插在锁上，我打开了它。

youdao

In his file of sent messages, one email address looked unusual, so I opened it.

在他发送的邮件中，一个电子邮件地址看上去不同寻常，所以我把它打开。

youdao

So I opened it. You cannot imagine how carefully,carefully.

VOA: special.2009.05.16

And every night, late at night, I turned the lock of his door and opened it C oh,so gently! And then, when I had made an opening big enough for my head, I put in a dark lantern, all closed that no light shone out, and then I stuck in my head.

VOA: special.2009.05.16

I played Tennis tournaments all over the place and I met new people and make connections and stuff and something that Tennis helped me with is coming to the United States, as you might already know that it is expensive especially for an international student to go to college here in the United States and with the scholarship that I get through Tennis it helps me a lot, so Tennis has opened up many doors for me for opportunities."

VOA: standard.2009.12.14

"The cross was upside down outside the door so when I opened the door it fell in, " he said.

BBC: Graffiti on path

"I was so happy that it seemed to me to be like flying, so I opened my arms, miming a glide, " he has explained.

BBC: SPORT | Football | My Club | Fulham | Montella has lift-off at Fulham

It opened so many doors that I never imagined would be open for me.

FORBES: Kiss Your Boss Goodbye: Will You Leave Your Job In 2013?