Ifyouhavedifficultylocatingaparticularbook，pleaseaskourlibrariansfor___(assist).
assistance
暂无解析
Weallknowaboutthe_____thatsmokingcandotoourhealth.
The black writer wanted the other members of the workshop to treat_________as an equal.
电话是在1876年发明的。翻译
The plants need sand with a___ (deep) of at least 10 to 15 cm to grow.
I_____him150dollarsandmustpayhimbacktomorrow.