新学期第一节课，魏敏同学“晒”起了自己寒假作业的完成情况：外出时，看到一些公共自行车上有灰尘，我便连续几天到小区附近的公共自行车站点，擦拭公共自行车，另外，还参加了几次公益活动……你对这份寒假作业的看法是（ ）
①能缓解平时的学习压力，避免产生厌学情绪 ②能增进关心社会的兴趣和情感，养成亲社会行为
③不利于形成良好的学习习惯和生活态度 ④有利于养成参与公益活动、爱护公共设施的好习惯
A：①③
B：②③
C：①④
D：②④
我的书写最漂亮。
yí gòng
yǐ jīng
zuò xia
____
yì yuán
shí zhōng
xǐ yī
阅读短文，选择正确的答案。
Today is December 25 th. It's Christmas Day. It's winter now. It's cold, but I'm very happy. Because I can visit my grandparents. We will eat dinner together. I like winter best. I can make a snowman in winter. My mother's birthday is on December 12 th. So I can eat a big birthday cake in December.
划线字古今意义相同的一项是（ ）
After a heated discussion at the meeting，a new plan came________being，which would have a great effect________the culture life of people.
使用显微镜对光的程序是（ ）
①选遮光器上适宜的光圈对准通光孔 ②转动转换器，使低倍物镜对准通光孔
③左眼注视目镜（右眼睁开） ④转动反光镜调节出一个白亮的视野．
