if people___cutting down the forest,they will have nowhere___A.keep;to live in B.will keep;to live inC.keep;to live D.will keep;to live

If people___cutting down the forest,they will have nowhere___A.keep;to live in B.will keep;to live inC.keep;to live D.will keep;to live if people___cutting down the forest,they will have nowhere___A.keep;to live in B.will keep;to live inC.keep;to live D.will keep;to live if people___cutting down .if people___cutting down the forest,they will have nowhere___A.keep;to live in B.will keep;to live inC.keep;to live D.will keep;to live但答案选择的是A，所以我好迷惑哦。而且做了最近一期的英语学习 1.as well和too的区别2.（ ）If people___cutting down the forest,they will have nowhere___A.keep;to live in B.will keep;to live inC.keep;to live D.will keep;to live 3.( )David has made great progress recently.___,and___.A.So he has;so have you B. if if if “if any”“if ever”“if “if any”“if ever”“if IF ANY,IF SO,IF NOT,IF if never,if any,if not,if if(a) {if(b =IF(IF(D6 only if/if if only ,if necessary if...else if.else if.else if.的用法是什么 IF I if(a