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have done have been done have been doing be done
difficulty in learning difficulty to learn difficulties learned difficulties to learn
confident enough enough confident modest enough enough modest
risen raised arisen aroused
live in live on to live in to live on
try to master the value all at once enjoy them while doing other things in order to get some satisfaction expect great difficulties and give up when it is too hard to understand them be aware of its difficulties and enjoy them with full attention
met meet have met had met
met meet have met have been meeting
try to master the value all at once enjoy them while doing other things in order to get some satisfaction expect great difficulties and give up when it is too hard to understand them be aware of its difficulties and enjoy them with full attention
difficulty in learning difficulty to learn difficulties learned difficulties to learn
None of us Not all of us All of us All of us not
no difficulties to find some difficulties in finding no difficulty to find no difficulty in finding
in; on some advice for; for some advices on; some advice with; for some advice
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