- Junior high school days will be over _______ a week. How are you feeling?
- I'm trying to keep my cool because we've been together ________ three years.
A：in; in
B：for; in
C：in; for
D：for; for
写出下列词语的近义词。
舒展-____ 美丽-____ 轻盈-____
社会上一些不法分子以铜锌合金（金黄色，俗称黄铜）假冒黄金进行诈骗活动，为了鉴别黄铜和黄金，以下方法可行的是（ ）
open的意思是 ____.
