In order not to be disturbed, I spent three days ___ up in my study.
Lei Lei was only too ready to help others, seldom, _______, refusing them when they turned to him.
—Ted found a policeman passing by and handed the mobile phone over to him.—But he _________ at the place until the owner returned.
The books mainly deal with the trouble teens might have _________ right from wrong.
—Why don’t you buy some cakes while doing shopping yesterday afternoon? —Sorry, ____.
I hadn’t intended to get much from the business I ran the first year, while it _____ so well.