请问这两道英语选择题是考察哪部分语法知识的?总是错,想复习一下语法点了..Itisnotuncommonfor________problemsofcommunicationbetweenoldandyoung.A.theretobeB.therebeingC.theretobeingD.therebeItiswithher

　　请问这两道英语选择题是考察哪部分语法知识的?总是错,想复习一下语法点了.

　　.Itisnotuncommonfor________problemsofcommunicationbetweenoldandyoung.

　　A.theretobe

　　B.therebeing

　　C.theretobeing

　　D.therebe

　　Itiswithhersupport_____hewontheNobelPrize.

　　A.which

　　B.that

　　C.what

　　D.when