2.【2019 •河北】These cakes _________ with chocolate. Have one, please.
   A. fill         B. filled              
   C. are filled           D. were filled
【答案】C
【解析】考查动词的被动语态。蛋糕和装满是被动关系，而be filled with...是被……填满，所以句子翻译为“这个蛋糕注满了巧克力”，故选C。