I'm weak in English. Li Yan often _______ me _______ my English.
A:help, with
B:helps, with
C:helping, in
D:to help, in
农谚说“有收无收在于水,收多收少在于肥”,这说明植物生长需要( )
人潜入水中后看到岸边的一棵树,其实是( )