It is thein this country to go out and pick flowers on the first day of the springA. useB

问题补充：

It is thein this country to go out and pick flowers on the first day of the spring．

A. use

B. custom

C. habit

D. normal

答案：

A. use

(答案→)B. custom

C. habit

D. normal

解析：考查词义辨析。A用途；B风俗（地方性的）；C习惯（个人的）；D正常的（形容词）；句意：在这个国家在春天第一天里出去采花是一个风俗。根据句意说明B正确。