=>

a. We ought to use cloth bags instead of reusing plastic ones.

b. Last year we collected used paper and sent it for recycling.

c. Would you mind opening the windows?

d. Shall I empty the waste basket for you?

a. use / we / cloth bags / instead / ought / reusing / to / of / plastic ones.

=> We ought to use cloth bags instead of reusing plastic ones.

b.collected / and / used paper / it / for / Last year / we / recycling / sent

=> Last year we collected used paper and sent it for recycling.

c. opening / you / mind / the / would / windows?

=> Would you mind opening the windows?

d. you / Shall / waste basket / for / I / empty / the / ?

=> Shall I empty the wastebasket for you?