—We all had a lot of fun at the barbecue yesterday. Pity you weren't there.—I really should have gone with you but I________on some remaining problems.

Frank, with his two sisters, ________ London by train which ________at 8:30 next morning.

---- ___ leave at the end of this month. ---- I don’t think you should do that until ___ another job.

The witnesses(证人) of the accident said that the lorry _______ very fast at the crossroads when the accident happened.

The leaders from some of the countries suggested the nuclear weapon about Iran worth paying attention _______ at the international conference.