题目内容
19．Keep quiet，please．Someoneis listening（listen） to a concert inside now．分析 请保持安静，现在里面有人在听音乐会．
解答 答案：is listening
根据句意以及时间状语now可知，此处表示正在进行的动作，应使用现在进行时；由于主语为不定代词Someone，故用is listening．
点评 做本题时，需要掌握现在进行时态的意义及用法．
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| 43．A．obey | B．quit | C．retire | D．realize |
| 44．A．nature | B．power | C．mistake | D．accident |
| 45．A．change | B．offer | C．join | D．occur |
| 46．A．more | B．less | C．higher | D．lower |
| 47．A．else | B．well | C．same | D．instead |
| 48．A．person | B．chance | C．place | D．money |
| 49．A．no wonder | B．no doubt | C．no longer | D．no need |
| 50．A．explanation | B．development | C．expectation | D．disappointment |
| 51．A．used | B．annoyed | C．frightened | D．bored |
| 52．A．health | B．growth | C．time | D．response |
| 53．A．days | B．weeks | C．decades | D．months |
| 54．A．Admire | B．Consider | C．Inform | D．Manage |
| 55．A．interests | B．works | C．books | D．arts |
| 56．A．acceptance | B．variety | C．similarity | D．scientific |
| 57．A．historic | B．chemical | C．artistic | D．scientific |
| 58．A．though | B．even | C．still | D．just |
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