单项选择题

We cant accept your complaint of poor qulity, ______ you provide the certificate of inspection issued by CIQ.

A.why
B.unless
C.otherwise
D.however
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单项选择题
If you don’t apply the certificate of quality in time. we will not ______ The L C again.
A.delay
B.extend
C.close
D.write
单项选择题
All inspections are carried ______ conscientiously to the best of our knowledge and、ability.
A.in
B.to
C.out
D.away
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