He got good grades in his tests ______his hard work every day.A,because B,because of C,since D.lik
问题描述：
He got good grades in his tests ______his hard work every day.A,because B,because of C,since D.lik
答
B,because of
答
答案：B
because of是复合介词,后接名词（hard work）,而because 是连接,后接句子.