Do you know when＿?A.leave B.to leave C.leaving D.left

Do you know when (meet) Do you know when＿?A.leave B.to leave C.leaving D.left you,know,was,when,basketball,invented,do What,when,do,know,you,do,to.fire,there is,a连词成句 When you do fall in love,do you know 同义句转换：Do you know when we should start?Do you know when ( ) ( ) --Since when ________ each other --Oh I can't remember.A.did you know B.do you know C.you know D.have you known Do you know -------- when there is a fire?Do you know -------- when there is a fire?A.how to do B.what to doC.what do D.how do When will the train ( )Sheng zhen,do you know? A.arrive B.arrive in C.get reach和arrive的区别When will the plane( ),do you know?A.arrive B.reach on chritsmas day,children often get a lot of gifts.do you know when christmas is? Do you know when they______?------_______a winter morning.A.arrive at,On B.arrived,On Do you know( )to havean evening party?A:what B:when C:which D:whose Do you know when to have a picnic?什么意思阿? Do you know when to have a picnic?为什么用to have? Do you know when the plane< >a gets to b reachesc arrived reach Do you know ( ) we think A.when B.why C.what Do you know when it __?A,built B,was built C,has been built