给下面一段文字的结尾选择一个恰当的句子（ ）其实，寂寞给人的不仅是真实，而且也是一种锤炼，一种感情与思想的升华。有时，寂寞具有决定性的作用．在一定意义上，可以说，取得非凡成就的人， ________ 。

Tom doesn’t seem so enthusiastic as he was two years ago. — Yes. He’s really reached a point in his career ______ he has to decide what to do next.

How many students are there in each group— Usually each group _______ six students in our class.

Frank put the medicine in the top drawer to make sure it would not be ____ to the kids.[ ]

_________ is exciting to join the dance club on the weekend.