We (save).... a lot of trees if we (not waste)....... ...

★ Conditional Sentence Type 1

We (save)…. a lot of trees if we (not waste)……. so much paper

A. will save; waste

B. will save; waste

C. won’t save; don’t waste

D. will save; don’t waste

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If we (recycle)….. more, we (help)…. our Earth

A. recycle; won’t help

B. recycle; will help

C. don’t recycle; will help

D. don’t recycle; will help