Mrs.Smithlockedboththefrontandthebackdoorsbeforeshewenttobed______thatsomeonemightstealintothehouseatnight.
5岁小儿的正常血压约为（）
Americanseat______vegetablesperpersontodayastheydidin1910.
Ifhe_____thestorekeeper‘sscissors，hewouldhaveforgottentobuyapair.
Thosewhochangemobilephonestoofrequentlywillhavetopayforbeing______.
