66. We have to get the job done secretly(秘密地). We dont want others to know about it.67. M

66. We have to get the job done secretly (秘密地). We don't want others to know about it.
67. My train was 20 minutes late in the morning and there was a similar (相似的)delay in the evening. 
68.Miss Li speaks English with excellent pronunciation (语音). 
69. This company is one of the Post Office's biggest customers (顾客.客户).
70. The drowning swimmer required the lifeguard's immediate (即刻的)attention.
71. Our victory was celebrated (庆祝) with music and dancing.
72. I've never seen a Shakespeare's play performed (表演) so wonderfully.
73. Nowadays most people use paper handkerchiefs/handkerchieves (手帕) .
74. The boy spoke in a very low voice , admitting/confessing (承认) he had broken the glass.
75.Themajority (大多数)of people in my neighborhood are Italian.

解析：66. 副词修饰动词67. 形容词作定语68. 介词后用名词形式69. one of 后用名词复数70. 形容词作定语71. 一般过去时被动语态72. 考察see sth done, 73.此名词有两种复数形式74. 考察非谓语语法，v+ing 作状语，75. 固定短语，大多数

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