The news that scientists so far haven’t found out the cause of bird flu discouraged some WHO officials,________?

Could you tell me_____ yuanxiao in china?— Usually at Lantern Festival.

_____is he staying here?— For a month.[ ]

____ in1943 _____ the harmful smog made its appearance in Los Angeles.[ ]

Why do you like the piece of music best? —Because I can dance _____. [ ]