Ever/Never
A: Hi Mark, would you like to with me to New York? 
B: Wow! I've ............ been to the USA. 
A: Neither have I have you ............... travelled across the Atlantic? 
B: Yes, I've been to Brazil, but I've .............. been to the States. 
A: How about your sister? Has she ........... visited New York? 
B: She's been to the States many times, but I don't think she has ........... been to New York. A: Then we should all go.