According to a UN report, some 844 animals and plants __________ in the last 500 years.
He is ______as a leader but he hasn’t__________ in teaching.
The mistakes made by Chinese students are quite different from _________ made by the Japanese students in English study.
He knows so much about the story. He must have read the book,_____?
He knew the problem was serious and promised to look into it _____ he reached office.
Greatly moved by what she did,________.