lda collocation:帮忙解答

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2.win (过去式) _______ (现在分词) _______
3.send (过去式) ______(现在分词) ______
4.last (反义词)________
5. difficult (名词)__________
6. exercise (动词) ___________
7. reporter (动词) ___________
8. last (动词) _______

won, winning
sent, sending
first
difficulty
exercise
report
last

win -won -winning
send-sent-sending
first
difficulty

exercise
report
last