Into the dark apartment _______, who was quite surprised when everyone shouted “Happy Birthday”.
Why many adolescents (青少年) have trouble communicating with their parents lies in _____we call “generation gap.”
You’ve been working all morning — I think you _____a rest.
We drew this conclusion on the _______of research and experiments.
They are all interested in the newly-built apartments along the river, really want to buy them yet.
The chief editor expressed his doubt _______ senior people would enjoy reading such magazines.