用适当的介词填空。1. How many minutes are there ______________ an hour?
2. I'll give my friend a present ______________ her birthday.
3. There are so many people ______________ China.
4. The girl asks her teacher ______________ helping.
5. We often go to school ______________ bus.
试题答案
1. in 2. for 3. in 4. for 5. by