I remember _________ to their party, but I _________ the invitation in the office．

A.being invited; have left

B.inviting; was leaving

C.to be invited; have forgotten

D.to invite; forget

答案及解析： A

解析：

句意：我记得受到了参加他们的宴会的邀请，但我把邀请书忘在办公室中了。对以前发生过的事情还记得，要用remember doing；把某物忘在某处，要用leave。