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145 ÃÊ±Þ [ºÐ»ç] ºóÄ­¿¡ Á¤´äÀ» °í¸£½Ã¿À.   ÅäÇÃ
Chain reactions           thermal or fast neutrons can be controlled in a reactor.
(A) involve
(B) involved
(C) involving
(D) are involved
144 ÃÊ±Þ [ºÐ»ç] ºóÄ­¿¡ Á¤´äÀ» °í¸£½Ã¿À.   ÅäÇÃ
 The people           the meeting expressed concern about the lack of interest.
(A) attention
(B) attended
(C) attending
(D) attentive
143 ÃÊ±Þ [ºÐ»ç] ºóÄ­¿¡ Á¤´äÀ» °í¸£½Ã¿À.   ÅäÇÃ
By the middle of the twenty-first century, the computer           a necessity in every home.
(A) became
(B) becoming
(C) has become
(D) will have become
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