The investigation group tried in ______to discover what caused the failure of the engine.A
The investigation group tried in ______to discover what caused the failure of the engine.
A.diligence
B.vain
C.vigor
D.zeal
The investigation group tried in ______to discover what caused the failure of the engine.
A.diligence
B.vain
C.vigor
D.zeal
The writer comments on Stem's investigation and analysis in a ______ tone.
A.indifferent
B.negative
C.positive
D.ironic
A.investigation
B.competition
C.research
D.advice
The school conducted a(n) __________ investigation on the accident.
A、positive
B、extensive
C、negative
A、He who makes no investigation and study has no right to speak.
B、He makes no investigation and study has no right to speak.
The investigation, ______ will soon be published, was made by John.
A.at which the results
B.the results on which
C.whose results
D.at whose results
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