Thedestructionofthetwintowers_________shockandangerthroughouttheworld．
Theteamplayedhardbecausethechampionshipofthestatewas______.
求函数f(x)=x^3-3x^-9x+2的单调区间和极值.
Thedirectorrecommendedthatshe________(study)moreEnglishbeforegoingabroad.
Ababymightshowfearofanunfamiliaradult,_______heislikelytosmileandreachouttoanotherinfant.
