The reason why I worked as a waitress is that ______.
A. I ran out of money
B. I was proud of being a waitress
C. I did not care for money
D. I was sacked
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Why did the men go to the South Pole？
A. To study the secrets of the earth and the sky.
B. To experience the world' s worst weather.
C. To prove team work possible.
The purpose of the passage is to ______.
A. introduce the importance of flags.
B. introduce the history of the US flag.
C. introduce the process of designing a flag
D. introduce the function of a national flag
【B17】
A. convinced
B. considered
C. concerned
D. contributed
【C1】
A. ratios
B. speeds
C. rates
D. paces
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