下图表示生态系统的组成，图中X、Y分别代表

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A、绿色开花植物、酵母菌   

B、绿色开花植物、蝗虫

C、生产者、酵母菌

D、消费者、草

用所给动词的适当形式填空。

l. Mr. Brown was disappointed to see the washing machine he had_____ (repair)went wrong again.

2. Children's being addicted to the Internet gets their parents _____ (worry).

3. Many feared that Columbus would fall off the edge of the earth,____ (believe) to be fiat.

4.  _____     (take)his health into consideration, he has to be sent to hospital at once.

5. Mr. Smith,  ____     ( tire ) of the ___ (bore) speech, started to read a novel.

6. The girl let out a  _____ (frighten) voice at the sight of the snake.

7. His____   (frighten) voice scared the boys away.

8. The man is hard to ____     (deal with).

9.It is no use____    (argue) with him.