The second Sunday of May is Mother’s Day. It’s special day for children to show their lo

问题补充：

The second Sunday of May is Mother’s Day. It’s special day for children

to show their love for their mothers.

A. a；the

B. the；a

C. 不填；a

D. 不填；the

答案：

A. a；the

B. the；a

(答案→)C. 不填；a

D. 不填；the

解析：节日前不用任何冠词，a是不定冠词表示泛指，用在辅音音素开头的单词之前。