1) If we .............. more, we ................. the Earth.  a) recycle - will help b) recycles - would help c) recycled - helps 2) Factories................. waste into rivers if the goverment................ them heavily. a) don't dump - fines b) will not dump - fines c) will not dump - fine 3) If people............... to work by bus, there ..................... fewer car fumes. a) travel - is b) travelled - are c) travel - will be 4) We ..................... thousands of trees if we ......................... paper. a) save - doesn't waste b) will save - don't waste c) saves - not waste 5) If we .......................... water carefully, more people..........................fresh water. a) uses - have b) used - have c) use - will have

Exercise 1:Choose the best answer for conditional sentence TYPE 1

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