Complete the first conditional sentences with the correct form of the verbs in brackets. 1.if the earth gets hotter, more countries... (suffer)droughts. 2 . southern Europe will become a desert if global warming.. (continue).3.if we (not do)something soon, this problem will get worse. 4 . people (die) if they can't grow food.5.if the ice melts, polar bears. ..(not survive)