Those who smoke heavily should remind ________ of health, the bad smell and the feelings of other people.
The classroom is big enough, but we’ll have to move if we have more students.
—You know. Bob is a little slow ____ understanding, so… — So I have to be patient ______ him.
Mark was a student at this university from 1999 to 2003, ____ , he studied very hard and was made Chairman of the Students' Union.
The accident is reported to have occurred __________ the first Sunday in February.
People may have different opinion about Karen, but I admire her. ______, she is a great musician.