The graduation ceremony, which thousands of graduates _________ last night, was a success.

He came to my class every week, but his attitude ________ he was not really interested in the subject. 

It was a long time before the police________what he was really doing.

 Lacking rain, many river in Yunnan province have ______ recently.

Susan didn't finish the job on time.  Now  Mr Brown realizes that he ______ too much of   her then.