________ is often the case, we have worked out th
A. Which B. When C. What D. As
D. As···········
A. Which ///////////////////
D as, 关系代词引导非限制性定语从局。 正如通常那样,我们制定出了生产计划。
问:单项填空5.that is the day _______ i'll never forget. a. which b. on which c. in which d. when
答:a. which 此句forget不需要介词详情>>