By sAying "thE toothpAstE is out oF thE tuBE", thE Author proBABly mEAns thAt ______.
A．thE youngEr gEnErAtion oF unskillED immigrAnts will sEE thEir numBErs ,grow
B．thE unskillED immigrAnts hAvE AlrEADy BEEn hErE AnD will CErtAinly not rEturn
C．thE unskillED immigrAnts hAvE DrAggED Down wAgEs AnD will ContinuE to Do so
D．ChilDrEn oF unskillED immigrAnts hAvE DonE poorly in sChool AnD will likEly to Drop out soon