--You should have thanked her before you left.--I meant ________, but when I was leaving I couldn’t find her anywhere.
. He didn't want to see anybody, so he spent six hours ____ in the small room.
My son is very shy, but can you imagine ____ at the English party?
The Chinese ____ prefer tea to coffee.
Although he likes playing tennis, he is ____ but a good tennis player.
Professor Li, who I ____ abroad, still teaches in Peking University.