An investigation was made into the accident,______(在此事故中50人丧生).
第3题
After investigation it was proved that the ______ letter was written by a teacher.
A.anonymous
B.simultaneous
C.spontaneous
D.homogeneous
第5题
After days of investigation, the police were ____ reality.
A: looking into
B; approaching
C; finding
第7题
The writer comments on Stem's investigation and analysis in a ______ tone.
A.indifferent
B.negative
C.positive
D.ironic
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