Students should not be given so difficult a problem ___they cannot work out.A.that B.as C.while D.which请不要盲目写答案 ,B是正确的,

Students should not be given so difficult a problem ___they cannot work out.A.that B.as C.while D.which请不要盲目写答案 ,B是正确的,
Students should not be given so difficult a problem ___they cannot work out.
A.that B.as C.while D.which
请不要盲目写答案 ,B是正确的,

Students should not be given so difficult a problem ___they cannot work out.A.that B.as C.while D.which请不要盲目写答案 ,B是正确的,
这是个定语从句,选B是因为前面有so,as在定语从句中作宾语