If his parents are convinced ______ the fact that his son always focuses his mind ______

If his parents are convinced ______ the fact that his son always focuses his mind _______his study.

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of; on

of; at

by; to

on; at

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Staring at the priceless diamond      amazement, Mary dreamt of getting one．

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with

Mr. Han, my neighbor, is always helping those who are in trouble without expecting anything __________.

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in turn

in return

in detail

in addition

 They need twenty more workers ______ their group to do the job..

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except

but

beside

besides

Man’s life is often compared ______ a candle.

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with

_____ working ability，you are no worse than the others，it is just you who don’t put your heart in your work．

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In favor of

In honor of

In terms of

In case of