题目内容
根据句意,用括号内所给单词的适当形式填空。
1.It’s good manners to speak to the old ______________(polite).
2.________________ (communicate) between countries used to be very hard.
3.I was born in a ____________ (south) city in China.
4.Some ______________ (Canada) students will visit our school next week.
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