Ⅰ. 从方框中选择适当的短语填空
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keep fit, at least, at the same time,
thanks to, once in a while
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1. We got to the school__________.
2. _________ the teacher’s help, all the students passed the exam.
3. —How many people are there?
—________ five hundred, I think.
4. We went to the cinema ________ in the past.
5. We should eat more vegetables and fruit to___________.
答案：1. at the same time 2. Thanks to 3. At least 4. once in a while 5. keep fit
