—Another cup of coffee? That’s your third since lunch.—Yeah, well, I ____ all night preparing for my history exam. I can hardly keep my eyes open.
The ground isn't wet. It ________ have rained last night.
We tried to find a table for seven, but they were all _______.
In winter, it is dangerous to go to school with snow ______the ground.
_______ late you are, we will wait for you to come to have dinner.
_______ with her sister, Mary is even more hardworking and better at her lessons.