Peter ___ be really difficult at times even though he's a nice person in general.A shall B should C can D must

Peter ___ be really difficult at times even though he's a nice person in general.A shall B should C can D must Why does Peter often ___ late for class.填arrive还是be -I have no letter from Peter.-Oh,well,no news ___(be) good news. 英语啊冤孽Peter()be really difficult at times even though he's a nice person in generalAshouldBshallCcan Your+dog+is+really+cute,+peter?为什么能用really Peter can be really difficult at times even though he is a nice person in general.为什么要用can不用其他的情态动词 Really be rather baffling. Peter,___ here,please.（come） 连词成句:Peter,year,really,is,this,taller Peter's girl friend is really out of this world. You need to be really really I think it's difficult __(be)good at EnglishThe died fish is really ___(salt) for us. Peter likes ___(draw) pictures.And he ___(draw) well. peter and nick are ___（twin） ___(brother) This shirt is Peter's 对划线部分提问（划线Peter's) Whose ___ ___ shirt? Peter does his homework every day.否定句 Peter ___ ___ his homework every day. Let's play tennis with Peter.(改为否定句)___ ___ play tennis with Peter This key ___ be Peter's.His is still in the lock.A.may notB.can'tC.mustn'tD.needn't选择原因?