7. Agree（v.同意）-disagreeable（adj.令人讨厌的）
8. The worker in science must face facts whether they are pleasant or unpleasant.
I didn't know whether to laugh or to cry when I heard the news.是…还是…
Whether he succeeds or fails， he has to do his best.
He doesn't know whether she is in Britain or she has gone to France.
9. Thomas Edison failed thousands of times before he succeeded in producing the first electric lamp.
10. Accept（v.接受）-acceptable（adj.可接受的）
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