1 . With attention ________ on the research, he didn’t notice a person coming in.

A．concentrated

B．concentrating

C．concentrate

D．concentrates

2 . With his attention________on his book, he noticed nothing.

A．concentrated

B．concentrate

C．concentrating

D．to concentrate

3 . —Must you play the guitar so loudly?
—I can’t _____ my attention on my work.

A．fill

B．pay

C．connect

D．concentrate

4 . He was so ________ in his homework that he didn’t hear anybody knocking at the door.

A．appealed

B．absorbed

C．drawn

D．concentrated

5 . The writer was so _____ in her work that she didn't notice him enter the room.

A．concentrated

B．focused

C．absorbed

D．centered

6 . She was so        in her work that she didn’t realize it was time to pick up her son.

A．attracted

B．considered

C．absorbed

D．concentrated

7 . His attention ________ on what he was doing, he didn’t notice that his bike had been stolen.

A．was concentrated	B．was concentrating
C．concentrated	D．to be concentrated

8 . An ideal job should be one that ______ what you are good at with what you are interested in.

A．combines	B．connects
C．contacts	D．concentrates

9 . The writer was so ________ in his writing that he forgot to flick the ashes from his cigar.

A．concentrated	B．devoted
C．absorbed	D．fixed

10 . When I visited her,she was in writing a lecture speech on Chinese history.

A．absorbing	B．concentrated
C．devoted	D．occupied