2 Complete the sentences with the correct form of the verbs brackets. Use the present simple and will. 1 If we __________ (fly) less when we travel, it __________ (reduce) pollution. 6 Some endangered species __________ (become) extinct if we __________ (not protect) them. 7 We __________ (not be) late if Dad __________ (give) us a lift. 8 If our natural resources __________ (run out), humans __________ (not have) enough energy to survive on Earth. 9 More people __________ (have) homes if we __________ (build) larger houses.
If we fly less when we travel, it will reduce pollution.Some endangered species will become extinct if we do not protect them.We will not be late if Dad gives us a lift.If our natural resources run out, humans will not have enough energy to survive on Earth.More people will have homes if we build larger houses.