21. Lightning is a ____ of electrical current from a cloud to the ground or from one cloud to another.

A) rush B) rainbow C) rack D) ribbon

22. New York ____ second in the production of apples， producing 850，000，000 pounds this year.

A) ranked B) occupied C) arranged D) classified

23. By success I don‘t mean ________ usually thought of when that word is used.

A) what is B) that we C) as you D) all is

24. I caught a ________ of the taxi before it disappeared around the corner of the street.

A) vision B) glimpse C) look D) scene

25. Students or teachers can participate in excursions to lovely beaches around the island at regular ________.

A) gaps B) rate C) length D) intervals

21-25 AAABD