There's a __________ in our office that when it's somebody's birthday, they bring in a cake for us all to share.
With a huge amount of food ________,all of the staff are busy preparing for the dinner tonight.
It was ________I went there ________I began to know something about the matter.
________ got on the train when it began to move.
Looking at her _______ looks,we were _______.
She ________ to catch the early train,but she didn’t get up in time.