He was brave enough _________ for the school volleyball team and succeeded.

Hello, may I speak to Millie, please — _______.

This is______ difficult problem that few students can work it out.

Tom’s father had not spoken to him since his marriage, because he considered Tom ______ a mistake in marrying so young a girl.

Whether the buildings in this area should be pulleddown has remained ________; people are still looking for other possiblesolutions