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SECTION Ａ（15’）
Directions: Beneath each of the following sentences there are four choices marked A,B，C and D. Choose the one that best completes the sentence.
21. - Have you heard _____ news that the American Army has caught _____ alien?
-- Yes, I have. It is said that the alien was left behind by his fellows.
A. the; the B. 不填; an C. a; the D. the; an
Directions: Beneath each of the following sentences there are four choices marked A,B，C and D. Choose the one that best completes the sentence.
21. - Have you heard _____ news that the American Army has caught _____ alien?
-- Yes, I have. It is said that the alien was left behind by his fellows.
A. the; the B. 不填; an C. a; the D. the; an
