people in the world are sending information by E-mail every day.
If you want to make progress, you’d better be strict _____ yourself ______your studies.
— Do remember to go to see the doctor. —_____________.
She was disappointed to see the beautiful coat _____ she had bought the day before ______ with a lot of dust.
Hurry up! The train _______. You know it _______at 10:00pm.
The committee __ over the problem among themselves for two hours.