Experts have been warning___of the health risks caused by passive smoking

inese football team had experienced a series ofreforms However, its performances in Shenzhen in October allthe people, especially the crazy fans

The tourists, had enjoyed themselves so much in the botanic garden, were worn out

The fat boyalways worries about _______ enough food _______ every day. How funny!

下列词类活用与其他项不同的是（ ）