Give the（）of the problem and if possible,show how serious it

Give the（）of the problem and if possible,show how serious it 谁知道Give an example of the cause of the problem and if possib It was the most possible solution to the problem of water su the　problem 　of　food　asfety　is　getting　more　and　more　serious The most serious problem ________the new government is how t ()the problem of food shortage getting more serious,the gove The ______(照顾) of the old is a serious problem. if it's possible for you to give me the price lower than a d （）pollution is a serious problem to the human race.A.how to The serious problem ____ mankind now is how to protect the e the most serious problem facing the new government is how to what is the most serious problem facing the world?why?how ca