为了揭示大自然的奥秘，无数科学家进行了不懈的探索。下列说法错误的是（   ）

已知函数y=tanωx在（-$\frac{\mathrm{\pi }}{4}$,$\frac{\mathrm{\pi }}{4}$）内是增函数，则（　　）

    It's summer holidays. For Jacob, it means having a lot of free time to play with  ____ (he) friends. Usually, he isn't so excited about it, ____ (连词) this summer is different. This summer, he is going to see Justin Timberlake — one of his favourite singers

    Jacob got four tickets to Justin Timberlake's concert after he ____（win) an online singing completion （比赛） ____. (see) Justin Timberlake is one of his dreams (梦想), so it will something he will never forget.

    The biggest problem he had was  trying ____(choose) just three friends to go with him. He ____ (wish) that all his friends could go. He asked his mother ____(介词) help. She told him to choose people who also liked Justin Timberlake. Jacob thought it was ____ (冠词) good idea, so he chose three friends who liked Justin Timberlake as much as he did. He felt sorry for not____(take) his best friend Andrew, but he knew that Andrew didn't like Justin Timberlake' s music that much. Jacob's three friends were all very excited when he ____ (tell) them the good news.

    Now the concert is just a week away and Jacob can't wait any longer.

某班学生刘洪作了如下听课笔记，结合所学知识，你认为刘洪的学习课题最有可能是（    ）