6、的。4. Itiswidelyacknowledgedthatextensivedeforestationcontributedtoheavysummerflooding.ExpertsarguethatChinamustintroduceamassiveafforestationprogram.ButIdoubtwhetherafforestationalonewillsolvetheproblem.人们普遍认为过度砍伐造成了夏季特大洪水。专家认为中国必须推行大规模的植树造林计划。但我对仅仅植树造林就能解决问题表示怀疑。5. Mo