1.The stolen bike belongs to Jack.
=The bike which was stolen belongs to Jack. 被偷的自行车是杰克的。
2.The lecture given by Professor Zhang is about environment protection.
=The lecture which was given by Professor Zhang is about the environment protection.
3.China is a developing country
=China is a country which is developing.
4.Students wishing to go hiking should sign their names here.
=Students who wish to go hiking should sign their names here.