节 完形填空（共15小题；每小题2分，满分30分）阅读下面短文，掌握其大意，然后从16—30各题所给的a、b、c和d项中，选出最佳选项，并在答题卡上将该项涂黑。 wishing to encourage her young son’s progress on the piano, a mother took her boy to a paderewski concert. after they were seated, the mother__1___a friend in the audience and walked down the passage to greet her. seizing the 2 to explore the wonders of the concert hall, the little boy rose and eventually explored his way through a door ___3__ “no admittance.” when the house lights dimmed and the concert was about to begin, the mother returned to her seat and __4____ that the child was missing. suddenly, the curtains parted and spotlights focused on the impressive steinway on stage. in __5 , the mother saw her li
