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A．He taught his students how to pronounce the letters first.
B．He matched the letters with the sounds familiar to the learners.
C．He showed the learners how to combine the letters into simple words.
D．He taught his students how to pronounce the letters first. B) He matched the letters with the sounds familiar to the learners. C) He showed the learners how to combine the letters into simple words. D) He divided the letters into groups according to the way they are written.

A．It’s a new way of applying chemical fertilizer.
B．It’s an improved method of harvesting crops.
C．It’s a creative technique for saving labor.
D．It’s a farming process limiting the use of