

У меня есть сомнения насчёт этого договора.
I have doubts about this contract.
Без сомнения, это лучшее предложение.
Without a doubt, this is the best offer.
Его план не вызывает никаких сомнений.
His plan doesn't raise any doubts.
"сомнение" is in the lesson "Business 2" (Level 38), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.