The theory he had been sticking to___wrong
Reading for fun means much to us and we _______ never tell where its influence stops.
The mixture of his improved self-confidence and never-ending efforts is ________ lies behind his rapid progress in his study.
Taking a gap year is a good chance for students to learn skills and gain life experience, ______ them an edge in the job market.
If you________ the failed experiences, you would not havemade such a mistake in your homework.
Humor, if ________ properly, will help us break the ice and gain affection of others in social communication.