要是没有你的支持，我们就完不成那项任务了。翻译

Theplantsneedsandwitha___(deep)ofatleast10to15cmtogrow.

Weallknowaboutthe_____thatsmokingcandotoourhealth.

Ifyouhavedifficultylocatingaparticularbook，pleaseaskourlibrariansfor___(assist).

Itisessentialthatyou__________anydocumentcarefullybeforesigningit.