Question

She was quite tired after a long walk，________she had to do some washing．

1. A.
   and
2. B.
   yet
3. C.
   so
4. D.
   so that

Answer 1

B
解析：

分析：She was quite tired after a long walk和she had to do some washing之间在逻辑上有转折的关系，只能用yet来连接这两句句子，意为“然而”“但是”，此处等于but．(延伸)由于yet还可以作副词，所以本句用though来表达时，仍然可以用yet，但却不可以用but，如：Though she was quite tired after a long walk，(yet)she had to do some washing．