_________ the floor, I found his pen lying on the ground.

－Look! Everything here is under construction.

－Oh, has the building once _________ for exhibition been pulled down, too?

He was so __________ a key university that he would work until late into the night.

It is        to read the books our teacher recommended , for they are well _____ reading.

 _________ many times, but he still couldn’t understand it.

They no longer have to ______ large numbers of temporary workers to do the harvesting.

－What made you so delighted at Christmas?

－__________.

 I would appreciate _______, to be frank, if the goods could be delivered as soon as possible.

 Don’t interrupt me. I ________ letters all morning and have only finished five.

All the children are busy going over their lessons as the final exam is __________.