Ⅰ. 用适当的介词填空(10分)
1. He was born _____ a cold morning.
2. The girl began to learn to play the piano _____ an early age.
3. The beautiful music was _____ Gu Jianfen.
4. We often watch concerts _____ TV.
5. The boy can play all types _____ instruments (乐器).
