MarsBase1CampwasbuiltinJinchang,Gansu,toletyoungpeople...

問題詳情：

 Mars Base 1 Camp was built in Jinchang, Gansu, to let young people experience for___________.

A. it       B. them       C. itself       D. themselves

【回答】

D

知識點：人稱代詞

題型：選擇題