【題目】Having pictures to color will keep children ______ for hours.
A.amused
B.amusing
C.amuse
D.to amuse

【答案】A
【解析】本題考查非謂語動詞，非謂語動詞在此作使役動詞keep 的補語，要判斷賓語children 和補語amuse 的關系，從Children areamused.可以判斷，兩者是被動的關系，所以選擇過去分詞A amused。

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