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。
Mrs. Jones was very fond of singing. She had a good   16  , except that some of her high notes tended to sound like a gate, which someone had forgotten to   17  . Mrs. Jones was very conscious of this   18  , and took every   19   she could find to practice these high   20  . As she lived in a small house where she could not practice without   21    the rest of the family, she usually went for long walks along the country roads whenever she had time, and practiced her high notes there. Every time she heard a   22   or a person coming along the   23  , she stopped and   24    until she could no longer be heard before she started practicing again, because she was a   25   person, and because she was sensitive about those high notes.
One afternoon, however, a fast, open car came up behind her so   26   and so fast that she did not hear it until it was only a few yards from her. She was singing some of her highest and most   27   notes at the time, and as the car passed her, she saw an anxious   28    suddenly come over its driver’s face. He put his brakes on violently, and as soon as the car stopped, jumped out and began to   29   all his tires carefully.
Mrs. Jones did not dare to tell him what the noise he had heard had really been, so he got back into his car and drove off as   30   as he had been when he stopped.

A．voice B．noise C．sound D．note

A．close B．open C．repair D．oil

A．strength B．sickness D．advantage

A．time B．chance C．person D．place

A．notes B．songs C．signs D．sounds

A．preventing B．harming C．disturbing D．damaging

A．train B．car C．noise D．driver

A．path B．avenue C．street D．road

A．waited B．expected C．confused D．puzzled

A．brave B．shy C．ordinary D．unique

A．slightly B．gently C．quickly D．silently

A．beautiful B．exhausting C．difficult D．energetic

A．expression B．explanation C．impression D．reaction

A．approach B．observe C．repair D．examine

A．convinced B．upset C．puzzled D．pleased