Question

—How often do I need to feed the dog?

— It ___ food every day, or it will be hungry.

A. must give                                   B. must be give

C. must be given                            D. must be gave

Answer 1

【答案】C 

【解析】考查动词的语态。 它每天必须被喂食，应用被动语态，其构成是be+过去分词，故选C。