U2.5 There is virtually no one who support his proposal. U2.6 Beware of the swindler with a slick tongue and a smiling face.

U2.7 Don’t touch the bag, The explosive in it may blow up at any minute. Your life will be at risk.

U2.8 He looked confident about his job，but he lurked some doubts in the depth of his mind.

U3.1He honked his car horn to alert the pedestrians.

U3.2 The fast development of information technology is an outstanding example of human endeavor.

U3.3 Mary gropes for the proper words to express her thanks to the teachers.

U3.4 The headmaster's plain words conveyed a message of challenge to the young people.

U3.5 Don't tamper with the wires, or you may cause a short circuit.

U3.6 He thought he could defeat any opponent in the competition , but his over-confidence led to his failure. U3.7 What he said seems simple, but we can't fathom the implicit meaning in it.

U3.8 He tried to steer the groups random conversation to some constructive topics.

U4.1Can I be exempt from the regular physical examination this year？ I just had one three month ago before I went to the summer camp.

U4.2 Could you tell me again what I should do next? It has slipped out of my mind what you said to me yesterday.

U4.3We all assumed that Dave was a trustworthy person, but it turned out that we were wrong.

U4.4His misfortune was compounded by his wife's ill and his loss of job.

U4.5 Whether or not there are living beings in other space is of perennial interest to man.

U4.6 When you are under great strain, you will not be able to think clearly.

U4.7 Jim tends to lose his temper when his advice is not heeded. U4.8 Despite the teacher has erudite knowledge，he feels that it's difficult to speak articulately the need of students.

U5.1 Jane is a smart girl, she can always give any question appropriate answers on the spur of the moment.

U5.2 Our teacher attained full professorship before he was forty. U5.3 Environmental pollution is afflicts many cities and towns around the world.

U5.4 Acupuncture therapy produces marked effects on patients

suffering from arthritis.

U5.5 Instead of being profit-oriented, hospitals should make their efforts to take good care of the patients. U5.6 What sort of people are involved in the lawsuit?

U5.7 The factory is taking drastic measures to ameliorate the working conditions in the workshop.

U5.8 Outstanding young men and women are emerging from various walks of life .