【B4】A．afterB．beforeC．sinceD．when

A． AlthoughB． WhetherC． SinceD． When

A．AfterB．BeforeC．SinceD．Behind

A．afterB．beforeC．sinceD．till

John fell asleep he was listening to the music.A．afterB．beforeC．whileD．as soon as

The train had left（) Apce hurried to the railway station.A. afterB. asC. whileD. when

Were working______the clock to accomplish the proposal before Tuesday.A．afterB．beforeC．aga