an’t concentrate on his study recently．— Yes, that might ____ why he did so badly in thelast test．

________ surprises us most is that she doesn’t even know _______ the difference between the two opinions lies.

Did you hmention it D.That’s right

Please remember _______ the computers down when you leave the office.

ke, are you busy now — Not really I _____ my work, and I’mgoing to see a movie online