make a contributions____ the protection of environmentA.toB.for在网上查了说make a contributions to doing sth 但是这个后面是名词短语 也应该用to

make a contributions____ the protection of environmentA.toB.for在网上查了说make a contributions to doing sth 但是这个后面是名词短语 也应该用to
make a contributions____ the protection of environment
A.to
B.for
在网上查了说make a contributions to doing sth 但是这个后面是名词短语 也应该用to

make a contributions____ the protection of environmentA.toB.for在网上查了说make a contributions to doing sth 但是这个后面是名词短语 也应该用to
doing sth 相当于一个名词性短语,也就是具备名词性质,例如：Protecting the environment is our duty.