填空。

1. There      some juice.

2. There      some bread and apples.

3. There      a big door and five windows.

4. There      five small eggs and some chicken.

5. There      three books and an armchair.

6. It's time      go home.

7. It's time      lunch.

8. It's time      having dinner.

9. It's time      English.

10. It's time      draw.

11. It's time      drawing.

12. It's time      get up.

13. How many      are there in a week?  

      There       days in a week.

14. How many      (class)do you have today?  

      I have six      .

15. How many      (book)are there on the desk?  

      There       (12)books.

对2A及以上用电流速断保护灵敏性不符合要求的变压器应装设（）。

A.过流

B.零序

C.纵差

D.过负荷