设f(x,y)在点(0,0)附近有定义,且,则
Idon'tknowhowwecanmake________onthetimetableforanymorecourses.
________theconcerthadbegundidwerealizewhatasplendidshowitwasgoingtobe.
________(catch)intherain,hewaswettotheskin.
Allherhardwork__________intheend，andshefinallypassedtheexam．
