If you are too ________ of your children, they will never learn to deal with difficulties in life.
C
A个别的、各自的B侦探C保护的、防护的D有效的
______,weareairmailingyouourlatestquotation-sheet.
WethankyouforyourletterofMay5th,____yourpurchasefromusof5000tonsGreenBeans.
Hermindhadbeen__________intosuchaconditionasshecouldnotverylikelyhaveimaginedpossibleafewmonthssince.
In1995,anaverageof_______ofdomestictravelerswentonsightseeinginChina.