. All substances, ___ solids, liquids or gases, are made up of entirely atoms.
The city ______ we visited last year is the one _____the famous writer was born.
—Are they about to have dinner?—Yes, it ________ in the dinning room.
We were swimming in the lake _____ suddenly the storm started.
---Have you read the timetable ? ---Yes . The train ____ at 10:12 p.m..
Do you know __________ ?