【题目】It was __________ that they all went swimming in the river.
A.such a hot weather
B.such hot weather
C.so hot weather
D.so hot a weather

【答案】B
【解析】weather是不可数名词，故排除A、D项；so只有在与much或little连用时，其后才能接不可数名词，故排除C，所以答案是B。