____ the path that leads out of the town, you will come to a thick wood.
A. Taking
B. Take
C. To take
D. If take
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It rained heavily, ____ severe flooding in the area.
A. caused
B. causing
C. to cause
D. and caused
按中国制土粒分级标准,可将土粒划分为( )、( )、( )、( )4个粒级。
土壤吸收性包括( )、( )、( )、( )、( )。