取得企业法律顾问执业资格即取得受聘担任( )专业技术职务的资格。

A．工程师

B．助理工程师

C．经济师

D．助理经济师

—Mary broke up with me!

—You____ have forgotten about the Valentine's Day．

A．shouldn't

B．couldn't

C．needn't

D．mustn't