题目：
根据句意和汉语提示,在空白处填入适当的单词.
1. May I ___________(借) your dictionary? I left mine at home.
2. Everyone should take an active part in _______________(保护)the environment.
3.The confident young man will have his ______________(二十) birthday.
4. Everyone should try to be _____________(有礼貌的) and helpful to others.
5. China has got a _______________( 人口) of 1.3 billion.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：B
