With no one     them，the two thieves stole into the house．

More than a quarter of the energy       in the United States goes to moving people and goods from one place to another.

With a lot of tough problems       , the pilot was still calm, cool and collective under pressure.

      their final medical check, the astronauts boarded their spacecraft．

        her emotion, she buried her face in her hands．

She seems to prefer          American TV Shows to talking to me．

_________of danger in the street at night,she had to go home with a friend __________ her.
A  warned;followed
B  warning;following
C  having warned;following
D  having been warned;following

It’s time he _________ piano. Don’t you think he has wasted too much time online?

He sat at the desk, __________ a novel.

On feeling the earthquake，the teacher stayed calm in the front of the classroom，________ all the students to rush out of the classroom as quickly as possible.