Anxietycan________withchildren’sperformanceatschool.
Australia,whichisoneoftheworld'sdevelopedcountries,hasbecomerichthrough________.
Neverbefore_______sorapidlydevelopingasitistoday．
IntheUnitedKingdom,policeofficersarenotallowedtojoin________ortogoonstrike.
Whataretheparagraphqualities?
