OurModelUnitedNationsSchoolTeamwillbeleavingforShanghai...

問題詳情：

Our Model United Nations School Team will be leaving for Shanghai to attend the conference soon, for which the teammates　　　　for nearly a month.

ared                                                   d have prepared

preparing                                            been preparing

【回答】

D

知識點：動詞時態與語態

題型：選擇題