5、.It'sfifteen.C.It'sthree.(1)What'syournumber?________(2)What'soneandtwo?________(3)What'ssevenandeight?________四、连词成句。(共5题;共21分)14.(5分)what doing you are ? (连词成句)15.(5分)Birthday,to,Happy,Sam(!)16.(5分)are,two,there,squares,in,the,picture17.(5分)about/an/what/apple