看拼音,写汉字;
shī wànɡ ____ zhǎn xiàn ____ hē shuǐ ____dào dá ____
人体细胞内的染色体,正常来源是( )
Clerk: ____ I help you?
Mary: Yes, please. I want a sweater.
Clerk: What ____ do you want?
Mary: Blue.
Clerk: Here you are.
Mary: How ____ is it?
Clerk: Nine dollars.
Mary: I'll ____ it. Thanks.
Clerk: You're ____.