读一读，选择句子填空。
Hello. Good morning. Good afternoon. Goodbye.
—Hello, May I speak to Mr Black?—Sorry, he ______ Hong Kong for a meeting and he______ back in a week.
下列地区中华侨和华人分布最广的是
热带和温带的分界线是____．我们通化位于五带中的____．
