选择正确的选项，补全单词
pr __ __ tice
A. ac
B. aa
C. oc
Leaves change ____________ fall.
A. in
B. at
C. on
Can yellow leaves ____________ food?
A. makes
B. makeing
C. make
Leaves must ____________ green to make food for plants and trees.
A. is
B. be
C. are
They ____________ sunlight，air，and water.
A. need
B. needs
C. needes