从中选择相应的答语。
--- Shall we stop and have _______tea now? --- Great.
--- Will Mr. Smith be here soon? --- I can't tell. Let's go and _____when the train arrives.
--- Would you like to come to dinner tonight? --- I'd like to, _____I'm to busy.
--- How long have you ____the football team of the school? ---About two years.
--- My parents have been to the United States. --- Really? When _______there?