Mr.Li is writing a book on( )trees.A.to protect B.protecting
2个回答
B
on是介词,介词后面用动名词或宾语.
相关问题
Mr.Li is writing a book on ______trees.选择题 求解
Mrs Liu is kind and aways____her help to others.A.protects B
I wanted borrowed some books on how to protect the environme
To protect the Earth,we plant___trees every year.A.million o
英语语法 in order to remind people to protect trees,we put up a
protection is a fashion
Zhalong is a __________(protect) area
Breathing equipment is used (A to B with C for D at) protect
trees can produce some chemicals to protect themselves from_
A giant panda is a _____(protect) animal.