题目内容

A．codeB．signC．signalD．indication

A. code
B. sign
C. signal
D. indication

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A．expectationsB．pledgesC．declarationsD．commitments

A. expectations
B. pledges
C. declarations
D. commitments

A．collectingB．purchasingC．selectingD．ordering

A. collecting
B. purchasing
C. selecting
D. ordering

A．necessaryB．essentialC．crucialD．fundamental

A. necessary
B. essential
C. crucial
D. fundamental

A．benefitB．gainC．protectD．earn

A. benefit
B. gain
C. protect
D. earn