题目内容

A．problemB．solutionC．questionD．answer

A. problem
B. solution
C. question
D. answer

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A．increaseB．accumulateC．eliminateD．diminish

A. increase
B. accumulate
C. eliminate
D. diminish

A．ensureB．assureC．secureD．certify

A. ensure
B. assure
C. secure
D. certify

A．frequentlyB．delightedlyC．inevitablyD．unexpectedly

A. frequently
B. delightedly
C. inevitably
D. unexpectedly

A．introducedB．insertedC．modifiedD．revised

A. introduced
B. inserted
C. modified
D. revised