Mary must ______lessons. A.has B.have c.be

Mary likes music very much.That CD must be____【she】 Mary wants noodles and orange juice.She must Mary must ______lessons. A.has B.have c.be --Whose notebook is this? --It must be______.A.Mary B.Marys C.Marys ' D.Mary's Hurry up,Mary _______for us at the station.A.must be waiting B.must wait mary Mary:()() You must remember to give the bool to Mary.(同义句）______ ______ ______ give the bool to Mary. It must be Mary's.Mary‘s到底是名词还是形容词性的所有格?换成“她”该怎么填? -Whose book is this?-It must __ Mary.I saw her read it this morning. who is that?it must be Mary.为什么不能用she? you must hand__your work__time he sits __Tom and Mary at the same table 用介词 See who is there!＿it be Mary A May B must C can D will 我们因该尽量少吃肉,多吃蔬菜 we should _____ _____ ______less meat and more vegetabie may i speak to Mary?___________.A.yes,you must.B.no,you needn't C.this is Mary speaking.选什么?为什么? Mary ___on her new priject late last night ,so she felt sleeply in the office this morninga.must work b.must have been working c.must be working d.must have been worked选什么. Mary does not look well. She ------ be ill是 一道选择题 A can B.can not C.must D.must not --- Where is Mary?--- She ____ in the library.A.should be B.must beC.can be D.must have been为什么D不对?