1 to be connected

2 traffic

3 transportation

4 communications

5 liaison

1 good (virtuous)

2 benevolent

3 well-disposed

4 good at sth

5 to improve or perfect

1 good and honest

2 kindhearted

1 (of systems, facilities etc) comprehensive

2 well-developed

3 excellent

4 to refine

5 to improve

1 to change

2 to alter

3 to transform

4 to correct

1 complete change from the old rut (idiom); dramatic change of direction

2 a volte-face

3 to change old practices

1 lit. doesn't (even) enter a single aperture (of one's head)

2 I don't understand a word (idiom)

3 it's all Greek to me

1 grasp this fundamental point and all the rest will follow (idiom)

1 to act in collusion (idiom)

1 to be nothing to write home about (idiom)