____ the temperature falling so rapidly, we couldn't go on with the experience.
–Do remember to charge the battery 12 hours when you first use it. --_________.
My English teacher insisted that the exercises _________ very difficult and that we ________ it carefully.
28. Alone in a deserted house, he was so busy with his writing that he felt ________ lonely.
I would appreciate__ if you come to my grandma’s birthday party and say “Hello” to her.
The officials soon realized that, __________, things would get worse.