Mum ,have you bought any prawns_________?--------yes,l have

题目

Mum ,have you bought any prawns_________?--------yes,l have
A yet B already C and D but

答案

　　答案选A.
　　yet 用于否定句和疑问句
　　already只用于肯定句当中.
　　and but 后面需要接 句子.