There is so much noise in the yard that I can’t ________ my attention on my work.

Entering the reading room, I found Kate at the table and a report[ ]

The expression ____ means “在20世纪50年代”.

下列各句中划线的词语，使用恰当的一句是（ ）（3分）

ng, National Day is coming…一_________ Just occupy yourself in your study．