__________ was known to us all that Tom had broken his promise __________ he would give each of us a small gift.

He had lost his temper and his health in the war and never found________of them again.

 —What is the man, do you know?-— I don’t know exactly． But I think he can be ______ but a teacher．

Is _______ Qinghai-Tibet Railway plays an important role in China’s railway history the topic that you’re coming to?

People in the west make_______ a rule to buy Christmas presents for their relatives and friends.