2. With the development of science and technology,computers have played an important part

 our daily lives.

   A. on      B. about

   C. under   D. in

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   C. dressed   D. had on

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2. He has littered something on the floor.(改為否定 句)

He       on the floor.

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5. There are about 15 (office) in the block.

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I.單項選擇

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   C. cost   D. spent

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Mother makes me my bedroom every Friday.

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① Many young people planting trees on Tree Planting Day.

   A. joined         B. took part in

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3. too much sweet is bad for your teeth.

   A. Eat        B. Eats

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