战胜挫折和磨炼意志的内在动力是（ ）
A：坚持从小事做起
B：适度的自尊心
C：掌握科学的方法
D：树立明确的人生目标
从方框中选择恰当的语句，补全对话。
A.Yes, she is.
B.He's my brother.
C.No, he isn't.
D.He's my brother.
Cheng Jie: Who's that boy?
Amy:____
Cheng Jie: Is she your mother?
Cheng Jie: Is he your father?
劳____ 桌____
若a+b＜0，且ab<0，则（ ）
①careful — ____ ②excited —____
③quiet — ____ ④sad — ____
⑤beautiful — ____ ⑥good — ____
⑦fast — ____ ⑧loud — ____
⑨happy — ____ ⑩high — ____
