—How long ago _________ you _________ the English Club?

—I _________ it since two years ago.

A．did, join; joined

B．have, been in; joined

C．have, joined; have joined

D．did, join; have been in

促使早产儿动脉导管关闭的药物是

A．硝苯地平

B．卡托普利

C．前列腺素

D．吲哚美辛

E．双嘧达莫