How often does a person dream each night？A．Two to four times.B．Four to six times.C．Every 6

How often does the event take place？A．Every monthB．Every six monthsC．Every yearD．Every two

How does the man want to pay？A．In cashB．By personal checksC．By visaD．By credit card

We often read in novels how a seemingly respectable person or family has some terrible s

This boy often dreams______a happier life on some other planet.A．withB．ofC．forD．in

How much sleep does a person need?【31】the physiological bases of the need for sleep remain

How much living space does a person need? What happens when his space needs are not met? S