1.A friend is now repairing the piano in the workshop.

问题描述:

1.A friend is now repairing the piano in the workshop.
2.They are building a new bridge over the river.3.The postman delivered a newspaper this morning.4.My mother gave me a present yesterday.5.The police have arrested the thief.6.He was typing a letter 改被动语态

The piano is now being repaired by a friend in the workshop.A new bridge is being built over the riverA newspaper was delivered this morningI was given a present yesterdayThe thief has been arrested b...