— I'm leaving tomorrow.— Oh, what a pity! I won't be able to see you off. I ____ a tele-conference the whole morning.
Because of the recent bad weather,the work is several weeks behind ______.
Every minute must be made full use of________spoken English.
As you can see,the number of cars on our roads________rising these days.
Ten minutes later,a bus________and everybody got on it.
I have some trouble________physics.I would be grateful________you if you could give me some advice on it.