一定时期流通中所需要的货币量等于商品价格总额除以()
Canyoutellusmore___(precise)whathappenedlastnight?
Justafewyearsago，Tanyawas___(home)andbeggingformoneyinfrontofasupermarketinNewYorkCity.
Ifyouhavedifficultylocatingaparticularbook，pleaseaskourlibrariansfor___(assist).
Iwouldverymuch______tovisitsomeoftheplacesthatIhavebeenreadingabout.
