What do you use the machine _____?--I use it _____the trees.

题目

What do you use the machine _____?--I use it _____the trees.
A.for;to cut down
B.in;to cut down
C.for;cutting down
D.in;cutting down

答案

A.for;to cut down
你用这个机器做什么用?我用它来砍树.