【推荐1】Creating an atmosphere where employees feel a part of a team is ________(challenge). (用所给词的适当形式填空)

【推荐2】I enjoyed most of the classes, but some of them were quite ________ (challenge). (所给词的适当形式填空)

【推荐3】Helen found the game very ________(challenge),so she kept practicing until she became confident enough. （所给词的适当形式填空）

【推荐1】To be honest, I can’t imagine a more _______(content) family anywhere. (所给词的适当形式填空)

【推荐2】The next two movements are full of desperate lows and ___________ (uplift) highs which perhaps reflect both his sufferings and his strong will to fight it. (所给词的适当形式填空)

【推荐3】She goes to class every________ day on Monday, Wednesdays and Fridays. (用适当的词填空)