51．I have just moved to a new house．Please write down my new _________ --18 Park Road．

50．Don't _________(run quickly)．There is plenty of time left．

49．My cousin is studying in Beijing，so we _________(not very often)see each other now．

48．We should never do anything _________(违反)the law．

47．It is not safe for such a small child to swim _________(单独)in the river．

A．请根据句意或括号中的中文提示、英文释义，写出句中所缺单词，使句子通顺。(每小题1分，共7分)

46．Miss Li is _________(严格的)with us，hut she is the most popular teacher in our school．