Mrs.Smithlockedboththefrontandthebackdoorsbeforeshewenttobed______thatsomeonemightstealintothehouseatnight.
改寫病句：WhiledrivingonBlueberryAvenueyesterdayafternoon,atreefelltowardJack
ORS溶液不宜用于（）
He‘sworkinghard_____.
Thetwogirlscompetedwitheachother______thehighestmark.
