I am.___ ___,David.can you spell your name?

I am.___ ___,David.can you spell your name?
Good morning
good morning
can you tell me your name?
yes.my name is David.are you Tim?
yes,I am.__________ __________,David.can you spell your name?
yes.d-a-v-i-d,david.
excuse me.what's this in english?
it's an eraser.
thank you.
you are welcome.
空格里该填什么呀
只能填两个单词