Keep ________!  Don't make noise in the hospital.  

Ann isn't so      as Tina.    

It's _____ to work out this problem. You needn't go to the teacher.

What a pity! Liu Xiang didn't win the   __   hurdle (跨欄). 

用所給詞的適當形式填空。
l. If _____ (impossible), I want to buy a robot and let it do housework for me.
2. —Where were you when I called you yesterday morning?
    —I was in the _____ (barber) chair.
3. Yao Ming is _____ (certainly) that he will be in London for the 2012 London Olympic Games.
4. I couldn't fall _____ (sleep) last night because there was too much noise near my house.
5. I _____ (sincere) hope that you can get a good grade in this math test.

Green vegetables are ____your health.  

What            weather we're having !  

The children were out and the room was         .  

I am        that you helped me find my book.

He was         the new invention and asked the scientist about it over and over again.