根据汉语提示，用词语的正确形式填空。

1．The students should be always strict with _________（自己）．

2．It’s snowing hard．You must drive _________（仔细）．

3．Unluckily，Liu Xiang's dream of _________（赢得）the gold medal of 2008 Olympic Games couldn't come true．

4．July and August are the hottest _________（月）in North China．

5．Andrew's friends like him very much because he is kind and _________（帮助）