I was walking along the road _____ someone patted me on the shoulder from behind

The ship had 500 passengers _______

1If you want to work onRadio Beijing, keep Englishwell.

How are you getting along with your project? — I was about to give up when an idea occurred tome ____ I could work with my roommate Tim. [ ]

When I met him the other day, it was the first time we _____ each other since we were at school