[单项选择]We have entered an era when ever greater numbers of people wish to travel and have the means at their ______ of doing so.
A. disposal
B. disposition
C. arrangement
D. administration

[单项选择]We have entered an era when ever greater numbers of people wish to travel and have the means at their ______ of doing so.
A. disposal
B. disposition
C. arrangement
D. administration

[单项选择]— Have you ever met Tom
— Yes, we ______ at the concert.
A. met
B. have met
C. were meeting
D. had met

[单项选择]When we have done something wrong, we should_________.
A. look honest and think over the fault carefully
B. escape from being disturbed
C. admit the fault and express the regret
D. forgive ourselves

[单项选择]Have you ever received ______ of what have happened to her
A. the word
B. words
C. word
D. the words

[单项选择]Only when we have weighted all the factors involved ______ decide when would be the best time to start.
A. did we
B. we did
C. can we
D. we can

[单项选择]Have you ever bought something just because the salesmen _________ it
A. talked you from
B. talked you into
C. talked you in
D. talked to

[单项选择]

Have you ever wondered why different animals or pests have their particular colors Colors in them seem to be used mainly to protect themselves.
Birds, especially seagulls, are very fond of locusts, but birds cannot easily catch locusts because locusts change their colors together with the change of the color of crops. When crops are green, locusts look green. But when crops are ripe, locusts take on exactly the same brown color as crops have. Some other pests with different colors from plants are usually easily found and eaten by their enemies. So they have to hide themselves in terror for lives and appear only at night.
If you study the animal life in any part of the world, you will find the main use of coloring is to protect themselves. Bears, wolves and other beasts move quietly through forests. They are usually invisible to the eyes of hunters, because they have the color much like the barks of trees.
An even more strange act remains to be noticed. A
A. the change of color in locusts
B. the protective coloration of animals and pests
C. how a certain sea fish protects itself
D. animals or pests can dye themselves different colors