46. When people looked at him too （intently， tentatively）， he felt very uncomfortable.

　　Intently： giving careful attention to something so that you think about nothing else

　　Tentatively： not definite or certain， and may be changed later（暂时，试验性的）

　　47. Since she didn‘t know anybody in that city， she was rather （hesitant， tentative） when accepting the job offer.

　　Hesitant： uncertain about what to do or say because you are nervous or unwilling

　　Tentative： done without confidence（这是tentative的第二个意思）

　　48. “Do you really think he will give up the position？” he （scoffed， scold）。

　　Scoff： to laugh at a person or idea， and talk about them in a way that shows you think they are stupid； make fun of

　　Scold： to angrily criticize someone， especially a child， about something they have done

　　49. She told the children about her life on the farm all those years ago， how she （got used to， used to） get up at four every morning to milk the cows.

　　Get used to： to have experienced something so that it no longer seems surprising， difficult， strange etc

　　Used to： if something used to happen， it happened regularly or all the time in the past， but does not happen now

　　50. The teacher told the boys first to （pour， splash） some water on the floor before mopping it.

　　Pour： to make a liquid or other substance flow out of or into a container by holding it at an angle

　　Splash： to make someone or something wet with a lot of small drops of water or other liquid CF： sprinkle

　　51. When he was discovered， the pick-pocket （waved， flapped） a knife to threaten the people around him.

　　Wave： to raise your arm and move your hand from side to side in order to make someone notice you

　　Flap： to move quickly up and down or from side to side， often making a noise

　　52. The eagle suddenly （drifted， swooped） down and snatched the piece of meat.

　　Drift： to move slowly on water or in the air

　　Swoop： if a bird or aircraft swoops， it moves suddenly down through the air， especially in order to attack something

　　53. With the help of the specially trained dogs， they were able to （rescue， save） ten people buried in the snow.

　　Rescue： to save someone or something from a situation of danger or harm（强调营救的过程）

　　Save： to make someone or something safe from danger， harm， or destruction（强调安全）

　　54. His feet were numb with cold； as soon as he got into the room he started （rubbing， stroking） them vigorously.

　　Rub： to move your hand， or something such as a cloth， backwards and forwards over a surface while pressing firmly

　　Stroke： to move your hand gently over something

　　Numb means unable to feel anything