题目

He must learn to look after ________ (he) when his parents aren't at home. 答案：【答案】himself【解析】句意：当他父母不在家的时候，他必须学会照顾他自己。look after oneself照顾某人自己。主语是he，所以这里填反身代词himself，表示“照顾他自己”。故填himself。在△ABC中，∠C＝90°，AC＝9，sinB＝，则AB＝ A．15B．12C．9D．6