Complete the sentences with the given words in their proper forms（用括号中所给单词的适当形式完成下列句子）：

【1】He is the leader of the team. His____________ often help him a lot. (help)

【2】There are a lot of estate__________ on this road. (agency)

【3】His father is thinking about ___________ a new flat. (choose)

【4】Of all the apples, he took the ____________ one. (small)

【5】Please tell the _____________between the two words. (different)