张某，女，12岁，恒牙牙合。磨牙远中关系，前牙深覆牙合深覆盖，上下牙列Ⅰ°拥挤。

如果用Begg矫治器治疗，为了打开咬合应 （）

A.制戴后牙牙合垫

B.戴用口外弓

C.使用 * * 导

D.使用Ⅱ类牵引

E.制戴N弓

Concerning the E.U.，which of the following statements is wrong？（）

A.A college student in Greece can get a job in the U.K.in summer vocation.

B.All the member countries adopt the currency，euro.

C.The executive body of the E.U. is the European Commission，headquartered in Brussels.

D.The Council of Ministers has the final power to decide E.U.actions.