用所给单词的适当形式完成下列句子。

1. Lots of ____________ (foreign) come to visit the old town every year.

2. Don't mind _____________ (offer) your help to others whenever necessary.

3. He works in the ____________ (big) computer company in the world.

4. There are _____________ (hundred) of people dancing at the square after supper.

5. My mother was ____________ (water) flowers in the garden when I came back.

6. She is proud of _____________ (she) for not giving up easily.

7. The boy sat down excitedly because he answered the difficult question ____________ (correct).

8. Everybody likes to ask him for help because he often ____________ (come) up with good ideas.

9. It is a good habit to brush your ____________ (tooth) after each meal.

10. Many school things were ____________ (send) to Yushu last month.

某块流量仪表在DCS中突然回零，可能的原因是（）。

A、控制站死机

B、I/O卡故障

C、画面翻动太快

D、通信网络断了