I'm John Brown . I'm a doctor . I'm very ____(忙碌的) every day . I ____(通常) get up at 7:00 . After  ____  (吃) breakfast at about 8:00 , I drive ____ (我) car to work . When I arrive at the hospital , I ____(开始) to work . At 12:00 , I have lunch . In the afternoon , I always have meeting and see the patients .

    I often get ____(家) at seven o'clock____（在） the evening , I always read books and listen to the music . I like evening best . On holidays , I often go out____(和) my family . we take a lot of____(照片) . I like ____  (打) basketball very much . Yao Ming is my favourite player . I'm proud of him .

设a,b是两条不同的直线，$\alpha ,\beta$是两个不同的平面，则下列四个命题中，正确命题的个数是（   ）
①若 $a\perp b,a\perp \alpha$,则$b\parallel \alpha$ 

②若$a\parallel \alpha ,\alpha \perp \beta$,则$a\perp \beta$
③若  $a\perp \beta ,\alpha \perp \beta$，则$a\parallel \alpha$

④若$a\perp b,a\perp \alpha ,b\perp \beta$，则$\alpha \perp \beta$

综合性学习。
        寒来暑往，四季更替，自然界就是这样演绎着春夏秋冬的变化，周而复始。不经意间，我们发现，我们与自然界是那么贴近，我们的生活因四季的变更而显得异常精彩美丽。来吧。同学们，参与我们班的综合性学习活动《感受自然》吧，让我们迈着轻松的脚步走进自然，走过四季，让我们看风景去！