Such（）fine weather is（）unusual chance for us togo swimming.a.a,anb./,anc./,ad./,the麻烦解释一下,谢谢

Such（）fine weather is（）unusual chance for us togo swimming.a.a,anb./,anc./,ad./,the麻烦解释一下,谢谢
Such（）fine weather is（）unusual chance for us to
go swimming.
a.a,an
b./,an
c./,a
d./,the
麻烦解释一下,谢谢

Such（）fine weather is（）unusual chance for us togo swimming.a.a,anb./,anc./,ad./,the麻烦解释一下,谢谢
答案选B

解析：such a +形容词+名词；由于weather是不可数名词,因此把不定冠词a省略掉；

an unusual chance：一次不同寻常的机会

a
如此好的天气 可说such a good weather,此句可看做主（such a fine weather)系is表(an unusual chance for us to go swimming.

c./，a
unusual 是福音字母j开头，因此前面必须用a