____ to the surprise of the teachers, the naughty boy turned out to be the person who saved the dying girl. 

—Can you describe a distinctive characteristic of this animal?—Its neck can be extended ________ of its body.

 The cousins are alike in age，but ________ they are as different as day and night.

 With more and more farmers moving to cities, an inadequate labor force is    becoming a major factor affecting the country's grain output.

 To improve your spoken English, you’d better listen to the tape __________.