问题补充:
—Has Mary been back?
—Not yet.She will come back the evening of June .
A. at,first
B. to,thirtieth
C. on,the twelfth
D. on,the nineteen
答案:
A. at,first
B. to,thirtieth
(答案→)C. on,the twelfth
D. on,the nineteen
解析:考查时间介词和序数词。“玛丽回来了吗?”“还没。她一月二十晚上回来。”指具体的一天或上下午、晚上用介词on,排除A、B;D项的日期没有用序数词形式。故选C。