1.When dealing with students, teachers are supposed to adopt ______ and caring approaches, as they are unique young individuals of different personalities.
A. abstract B. efficient C. flexible D. effective
2.As is known to all language learners, newly learnt words will soon be forgotten unless ______used in everyday communication.
A. exactly B. finally C. gradually D. frequently
3.The knowledge that his friends have deserted him is a (n) ______ pill for Mr. Smith to swallow.
A. extra B. common C. bitter D. effective