mary is thirteen years old,and ben is also thirteen years old.（合并为一句）mary and ben are of the _____ ______.

mary is thirteen years old,and ben is also thirteen years old.（合并为一句）mary and ben are of the _____ ______. mary is thirteen years old,and ben is also thirteen years old.（合并为一句）mary and ben are of the _____ ______. Mary is my friend.( ) is thirteen years old.空着的用适当代词填上 Mary ______ thirteen next year .(be)为什么不用 is going to be Mary is thirteen years old.Peter is twelve years old.(合并成一个句子）Mary is one year __ __Peter. He is thirteen(对thirteen提问） his a__ is thirteen mary _________(be)thirteen next year thirteen and seventeen is t_____ Thirteen and six is n______. What is nine and thirteen ( )student number is thirteen是什么意思 ( )student number is thirteen是什么意思 Thirteen. She is thirteen years old.对thirteen years 提问 My sister is thirteen years old.(提问thirteen years old) The boy is thirteen（thirteen）对括号部分提问. Mary,are you thirteen years old?（做否定回答）