I didn’t quite follow him because he explained the theory _____that is too abstract for me.
Tony likes listening to music, ____ he hates practicing the violin.
In later years, people reported ____ a monster swimming across the lake.
____, the airport is closed at the moment.
–How are you feeling about the story of a young lady’s being taken away by a UFO last week?--We are very frightened—I ____bad dreams for weeks.
A teacher should have the ability to be ____ his or her class.