Is this the reason __________ at the meeting for his carelessness in his work?[ ]

Liu Xiang is regarded ____ one of the best runners in the world.

A big party was held in NO.18 Middle School last night, the teacher with students _____ singing and dancing happily at the party.

______ people were found ______ after that earthquake.

The Frenchman caught _______ a cold ______ he coughed day and night.[ ]