句要用虚拟语气。即：advisethatsbshoulddo的形式7Hedevotedhimselftothecommu
itybedevotedtoA专心致志于，献身于B热爱，很喜欢8atthecostofsacrifici
gotherspeciesatthecostoflossofotherspeciesatthecostof以…为代价，attheexpe
seof相同atallcosts意为