The changes in the city will cost quite a lot, ___________they will save us money in the long run

下列各句中，没有语病的一句是（ ）

Steve, I hear that Peter has won another championship.—It’s not surprising. _____________. He practises hardest in the team.

The driver wanted to park his car near the roadside but was asked by the police ________．

_____we are not attacked by nuclear weapons, we promise that under no circumstances _____ use the bomb first but we reserve the right to use it for counter-attack when necessary[ ]