【B3】A．IfB．AsC．ThoughD．Unless

Never get off the bus（)it has stopped.A.ifB.as soon asC.untilD.or

【C12】A．AsB．As ifC．ThoughD．Unless

【C2】A．IfB．UntilC．DespiteD．Unless

He was warned______he should make the same mistake again.A．ifB．givenC．lestD．unless

【C2】A．only ifB．much asC．long beforeD．ever since

【C2】A．WhileB．AsC．SinceD．Unless