The murderer was brought in, with his hands _____ behind his back.
| A．being tied | B．having tied | C．to be tied | D．tied |
— I heard that one of the middle school students died from overwork.
— Yes, ______ news came as ______ great shock.
| A．the; / | B．the; a | C．/; a | D．/; / |
smoke
| A．pardon | B．lesson | C．alone | D．button |
smooth
| A．worth | B．wealthy | C．southern | D．south |
explanation
| A．example | B．exit | C．explain | D．exam |
climb
| A．hour | B．laboratory | C．bomb | D．bitter |