When I entered the classroom, I found the students ______ the questions in groups

____________ , I found all the seats were taken

I found him ______on the ground.

I ______ to the meeting on time, but I had a flat tire on the way.

1．I found _________ really difficult for me to guess the meaning of the word．

I should ______ him up to tell him the information.

——Where did you put the car keys?
——Oh, I __________ I put them on the chair because the phone rang as I __________in．

32． —Shall I tell Bob the news?—No，you _________．I've told him already．

10． The next morning I found everything _______with snow，

Library computers on the ground floor _____.

I objected______the meeting without him.

Doctor Green went on with his experiment on human being _____________the debate going on around him.