our teacher set us such a difficult maths problem we couldn't workd outA.that B.as C.which D.even

Our math teacher is s(?) with us. our teacher's funny stories made us (feel)happy It's time that we set about doing our homework.改写:It's time for us to do our homework. We all love our English teacher.She's always f________to us. We are ( s )our teacher gives us good (a ).填单词,首字母已出 Our teacher tell us to ___ (do something very often to improve one's skills)our ...Our teacher tell us to ___ (do something very often to improve one's skills)our spoken English every day. Our teacher told us ______in the hallways. our teacher is---------------------(help)to us Our English teacher often tells us j_____. Our teacher often talks us English Our teacher takes us to ___ ___. our teacher often （say ）us stories Our teacher teaches us maths.同义句 Our teacher is very -----(friend) to us. These day our teacher teaches us English____ Our teacher tell us plants d____from seeds. Last week our maths teacher set so difficult an examination problem___ none of us worked out.A.thatB.whichC.as D.so that.Please explain. our teacher set us such a difficult maths problem we couldn't workd outA.that B.as C.which D.even