His_______argument against our proposal is based on misinformation,
A.organic
B.valid
C.formal
D.principal
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After a short holiday, he_______ himself once more to his studies.
A.applied
B.engaged
C.managed
D.conducted
Depression, unexplained fear and unreasonable actions are the_______of a patient with mental health problems.
A.marks
B.systems
C.symbols
D.symptoms