Did you find the opera easy _____?A.to understand B.to be underst_英语解答

Did you find the opera easy _____?A.to understand B.to be understood
why

人气：218 ℃　时间：2019-11-02 10:48:00

解答

选a
这句话的主语是you,要是选b的话,主语就是opera了.