My desire to( )( )()( )in favor of healthy, happy children drew me to medical research.
A. tip the scales
B. tip a scale
C. tip scales
D. tip the scale
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Jack was grief-stricken by the death of his wife, and he slowly isolated himself( )( )()( )his friends and relatives and became severely depressed.
A. of
B. to
C. on
D. from
He said that he wouldn’t publish his findings until he( )( )()( )( )his result.
A. invented
B. validated
C. confirm
D. valid
The international community adopt a policy of no( )()( )to terrorists
A. commitments
B. conditions
C. compromises
D. concessions
Recently, when feelings of uncertainty and doubt start to( )( )()( )every night, Lucy can’t sleep well.
A. creep in
B. come in
C. fall in
D. make in