The recent research attempts to the effectiveness of different drugs used for the new virus.
(2013·辽宁卷)To her joy,Della earned first the trust of her students and of her collegues.
At our factory there are a few machines similar to _______ described in this magazine.
The traffic on the main streets has a longer green signal than _______ on the small ones.
I’ve lived in New York and Chicago, but don’t like ____ of them very much.
There are a small number of people involved, possibly ______twenty.