单项选择题
A. before B. after C. because D. as
The president stood by a window inside the room,（）, loo...
单项选择题The president stood by a window inside the room,（）, looking over the square.
A. where I entered B. into which I entered C. which I entered D. that I entered
The students spent as much time getting trained as they...
单项选择题The students spent as much time getting trained as they （）studying.
A. disliked B. were C. had D. did
The engineers made two big plans for the dam, （）was nev...
单项选择题The engineers made two big plans for the dam, （）was never put in force.
A. one of them B. which C. one of which D. every one of which
