Only when I left home to go to college ___ how much my mother had done for me.
A. did I realize B. I realized C. had I realized D. I had realized
For many cities in the world, there is no room to spread out farther, _____New York is an example.
A. for which B. in which C. of which D. from which
Beautifully ________ in a quiet spot near the river, the hotel attracts a lot of people to stay.
A. locating B．lies C．situated D．sat
_________ we have been classmates for three years, she hasn’t left me much impression, so I can’t remember her after graduation.
A. SinceB. Although C. Because D. Unless
When and where to build the new factory _____not decided yet .
A. is B. are C. has D. have
The fire was finally brought under control, but extensive damage _________.
A. is causedB. was causing C. had causedD. had been caused
