You couldn’t have chosen any gift betterfor me　-______

下面一段话的空缺处依次填入词语，最恰当的一组是（ ）上世纪八十年代以来，为了票房，小品演员不惜以低俗取媚市场。风气之下，能坚守艺术品位者可谓 ，陈佩斯就是其中之一。《警察与小偷》是他的 之作，可以说，他为观众带来了笑声，带来了思考，更给业界 了良好的榜样。

You can only be sure of_____you have at present;you cannot be sure of somethingyou might get in the future.

My uncle’splane ____. Let’s wait for him here.

Helen always helps her mother even though going to school____ most of her day.