9．as busy as a bee 忙得团团转

　　10．date back to 追溯到，起源于

　　Ⅳ.选词填空

　　选用上述短语的适当形式填空

　　1．The oldest deposits in the cave date back to 120，000 years ago.

　　2．I watched the climbers come down into the valley.

　　3．There is no feeling on earth like winning for the first time．

　　4．All in all, over the past few years we have had an amazing time to be NBA fans.

　　5．I have been as busy as a bee ever since dinner.

　　6．In the middle of the picnic it started to rain cats and dogs，and everybody got soaked.

as＋adj.＋as＋动物的结构习语 含动物的常见习语 as quiet as a mouse一声不响、非常安静

as blind as a bat视力差、看不清(见)

as busy as a bee忙得不可开交

as brave as a lion非常勇敢 beard the lion 捋虎须；在太岁头上动土

bell the cat猫脖子拴铃铛；为了大家的利益承担风险

count sheep数羊以求入睡

　　 come down下来，下落

　　(教材P53)In the evening when the sun sets，we go out and sit on the balcony where we can watch lots of different animals come down to drink at the waterhole.

夜幕降临的傍晚，我们出去坐在阳台上就能看到许许多多不同的动物下来在水坑里饮水。