1I am busy doing my homework the moment.I am afraid I can’t go out with you.
答案:at
2They stayed in the USA the Christmas and experienced a completely Western style holiday.
答案:over/for/during
3He wanted to give people a good impression this special occasion.
答案:on
4She played a major part the success of the plan.
答案:in
5Just five minutes’ exercise a day could make a difference your health.
答案:to
