你将会在美国停留多久?
B: I plan to stay for about 10 days.
我打算停留约10天。
A: How long will you be staying in this country?
你将在这个国家停留多久?
B: I'm just passing through. I am leaving for Geneva tonight.
我只是过境而已。我今晚就前往日内瓦。