The Chinese Education Department suggests teachers should receive education to catch up

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A. farther；late
B. farther；later
C. further；lately
(答案→)D. further；latest
解析：只有表示实际距离的远，才可用 farther（此时也可用 further），否则就用 further。further education 进修； late 迟的；later 后来；lately＝recently 近来；latest 最新的。