It takes about half an hour _____ to our school from my home on foot.

Does Bob go to work___ bus or __ foot

Jessica ought to stop work.She has a headache because she _______ too long.

The old town has narrow streets and small houses _______ are built close to each other .

___ the phenomenon of “bystander effect” in the Yueyue event, most Chinese Strongly believe that there still exist love and warmth in people’s hearts