71.You’dbetterfinishyourhomeworkwithout

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’d better finish your homework without _______ （查阅、参考）your notes.

72. Each classroom in their school ______ _ (装备有) a computer, which is helpful to their study.

73. （多亏）the new policy, we are now having a happy life.

74. This new kind of chemical will help the air, soil and water

(使--------免受)pollution.

75. She noticed that she (看不起、轻视)by others, but she didn’t care.

71. referring to 72. is equipped with 73. Thanks to 74. keep----free from/of

75. was looked down on/upon