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7 ÃÊ±Þ [°ü°è´ë¸í»ç] ºóÄ­¿¡ Á¤´äÀ» °í¸£½Ã¿À.   ÅäÇÃ

Even though they            for twenty years, the two neighbors are not very friendly.
(A) having been lived side by side
(B) had been living side by side
(C) have been living side by side
(D) having been living sidy by side

6 Áß±Þ [°ü°è´ë¸í»ç] ºóÄ­¿¡ Á¤´äÀ» °í¸£½Ã¿À   ÅäÇÃ

(ÅäÇÃ) One of the primary materials used in the construction of buildings and roads is cement, (_______) primarily from limestone and clay.

1) a powder made

2) it is a powder made

3) which made a powder

4) a powder is made

5 ÃÊ±Þ [°ü°è´ë¸í»ç] ºóÄ­¿¡ Á¤´äÀ» °í¸£½Ã¿À   ÅäÇÃ

(ÅäÇÃ) Although (_____) with water pollution involve sources of fresh water, pollution of the oceans is also an environmental problem.

1) the main associated human health problems 

2) the main human health associated problems 

3) the main human health problems which associated

4) the main human health problems associated

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