Complete the sentences with the correct form of the verbs in brackets. 1 if our natural resources(run out), humans(not have) enough energy to live on earth (have) homes if we 2. more people(have) homes if we (build) larger houses. 3 scentists(make) many important medical discoveries by 2050.​

karabanovaann    2   15.05.2019 11:33    4