.Having a trip abroad is certainly good for the old couple, but it remains ___ whether they will enjoy it.
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.