用适当的介词填空。 1. It's very cold ______ winte
题型：填空题
问题：
用适当的介词填空。
1. It's very cold ______ winter in Nanjing.
2. The Chinese New Year usually comes ______ February.
3. The first class begins _______ eight o'clock in our school.
4. We often go to Hongshan Zoo _______ Saturday.
5. We celebrate National Day _______ October 1st.