<P> 1: ‘By foot’ is NOT correct, we say ‘on foot’.</P>
<P> 2: ‘I’m going home’ is too direct.</P>
<P> 3: ‘Journey’ is the correct answer.</P>
<P> 4: ‘How long does it take you to get to school?’ is correct.</P>
<P> 5: Transpacific, transatlantic, trans-Siberia, it means ‘across’.</P>
<P> 6: ‘Set off’ means to begin a journey.</P>