1、______(单选题)
A. disputes
B. changes
C. arguments
D. calls
试题答案:B
2、A newly developed plastic, prized by engineers for its low weight and its durability , has been developed.(单选题)
A. low cost
B. flexibility
C. long life
D. versatility
试题答案:C
3、The plane was circling over the landing field for l5 minutes when the pilot was told that he should use the Westside Field.(单选题)
A. is
B. Would be
C. has been
D. had been
试题答案:D
4、______(单选题)
A. succeeding
B. failing
C. acting
D. responding
试题答案:B
5、______(单选题)
A. enhanced
B. decreased
C. broadened
D. enlarged
试题答案:A
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