43. Ron said he would always （remember， have on his mind） the wonderful trip to the great wall.
Remember： to have a picture or idea in your mind of people， events， places etc from the past
Have on his mind： if something is on your mind， you keep thinking or worrying about it； if something is on your mind， that is what you are thinking about
44. The glass fell from the shelf and （went， broke） to pieces.
Go to pieces： if a person or what they do goes to pieces， they are so upset or nervous that they cannot live， work， or perform as they should（瓦解，身体垮掉）
Break to/into pieces： if you break something， you make it separate into two or more pieces， for example by hitting it， dropping it， or bending it （成为碎片）
45. I like Walter and have always enjoyed his （pleasant， pleasantry） company.
Pleasant： enjoyable or attractive and making you feel happy
Pleasantry： things that you say to someone in order to be polite， but which are not very important（打趣的话）
46. “I-I-didn‘t-” clearly the kid was frightened and （faltered， wavered） out the answer.
Falter： to speak in a voice that sounds weak and uncertain， and keeps stopping
Wavered： to become weaker or less certain
47. “The boy has been doing his homework for over an hour now and is （nervous， fidgety）， why don‘t you tell him to go out and play for a while？”
Nervous： worried or frightened about something， and unable to relax
fidgety： unable to stay still， especially because of being bored or nervous（烦躁的）
48. He was caught giving （covered， covert） glances at the textbook during the examination.
Covered： having a roof； having a layer of something on top
Covert： secret or hidden
49. Ever since he recovered from his heart attack， he realized he had to （feel like himself， take things easy）。
Feel like himself： feel himself fit and healthy
Take things easy=take it easy： to relax and not do very much
50. They had to （scrub， brush） the floor after the party was over.
Scrub： to rub something hard， especially with a stiff brush， in order to clean it
Brush： to clean something or make something smooth and tidy using a brush
51. He （flicked， plucked） the dust from his hat before entering the house.
Flick： to make something move away by hitting or pushing it suddenly or quickly（轻弹）
Pluck： to pull something quickly in order to remove it（拨毛，摘花等）
52. Sensing that someone was approaching him from the back， he （twiddles， whirled） around suddenly.
Twiddle： to move or turn something around with your fingers many times， especially because you are nervous or bored
Whirl： to turn or spin around very quickly， or to make someone or something do this
53. The child was shy. She kept （plucking， picking） her mother by the sleeve to drag her away from the word.
Pluck： to pull something quickly in order to remove it（拨毛，摘花，扯，猛拉等）
Pick： choose something； remove a flower etc； remove something
54. He just sat there （turning， twiddling） his thumbs， showing no interest in the discussion.
Turn： to move your body so that you are looking in a different direction
Twiddle one‘s thumbs： to do nothing while you are waiting for something to happen
55. He doesn‘t like his job， but he （keeps at， keeps） it before he can find something better.
keep at： to force someone to continue to work hard and not let them stop（坚持）
keep： to stay in a particular state， condition， or position， or to make someone or something do this（维持）
56. The boys （tossed， threw） a coin to decide who should make the first move.
Toss： to throw something， especially something light， with a quick gentle movement of your hand
Throw： to make an object such as a ball move quickly through the air by pushing your hand forward quickly and letting the object go
57. Don‘t （put down， put off） him by his appearance； he is actually quite a charming person.
put down： 不赞成，羞辱
put off： 阻止， 搪塞
58. At the seminar some scientists discussed heroic new experiments on the （intact， innate） human heart.
Intact： not broken， damaged， or spoiled
Innate： an innate quality or ability is something you are born with