Is this problem _________ the teacher explained last week A.the one B.that C.which D.one

this is a （ ) problem This problem is so difficult that we can't work it out.(保持句意不变）This problem is ____ difficult ____ us _____ work out. This problem is very___for her. This is ____ problem for us.A:quite a difficult B:a quite difficult This math problem is quite ____.It____took me one or two minutes说明句意 This is ____ ____ ____ How could we deal with this problem?改成同义 ____ could we ____ with this problem? 1.This math problem is more difficult than that one.This math problem ___ ___ ___ ____ that one.1.This math problem is more difficult than that one.This math problem ___ ___ ___ ____ that one.2.Mary is taller than the other girls in our class .Mary i How shall we ____ ____(处理)this problem? Do you know the ____ (sing )in French?Jack is ____ (important) player on the team.Do you know the ____ (important) of this problem? ____ plant is this? __ __ THIS MATHS PROBLEM IS ! It is difficult () out this maths problem This problem is not above us . this problem is difficult and ---------- (bore). this is such a difficult problem that few students can work it out同义句转换this is ____ _____ ______ problem the few students can work it out This problem was much more difficult than i ____ (expect). i found a different way to ____ this problem