—Where did she find________old pictures?

—She found them in the drawer by________accident.

When he looked up，he suddenly found himself________by a group of teenagers，________looked at him anxiously.

We can see light in his office. He___________ be in his office.

The woman was about to open the door ____________ she heard a strange sound from inside.

---I’m going to take part in the mid-term examination next week.   

---_________!

________wants to stay in a hotel has to pay their own way.

Water，which seems so simple and common，is________makes life possible.

On the top of Mount Tai，you can get a wonderful________of the sunrise.

Social attention should be paid          our earth from        .    

The young dancers looked so charming in their beautiful clothes that we took　　　　          

        pictures of them.