问题
选择题
16.Nobody knows who is the first one to add fertilizer ___ the soil to make plants grow better.
A．to
B．in
C．into
D．on
答案
答案：A
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16.Nobody knows who is the first one to add fertilizer ___ the soil to make plants grow better.
A．to
B．in
C．into
D．on
答案：A