When I tried to find _________that prevented so many people from taking part in the program, it seemed to me that there were two main reasons.
The student, who was ______ to be studying in the classroom, was taken to the police station, which I guess was ______ with the stolen bike.
They ______ on the project for almost one month before I joined them, and now we ______ on it as no good results have come out so far.
There is a ______ of furniture in the market, which can satisfy all the customers’ demand.
—Should I look up the new words each time I come across some? —No, refer to your dictionary only ______.
It is not until ______ that ______.