Bob looked back only to find an old classmate whose name ________ him for the moment.

3.As the years passed， many occasions--- birthdays， awards， graduations ____ with Dad’s flowers. 

The flooding      the bridge, so we can’t walk across it forever.

Heads from different countries gathered in Amsterdam and President Xi jinping _____ a speech on nuclear safety.

People wrote letters to get in touch in the past. Nowadays email has       the way people communicate.