A mustn't
B oughtn't
C mightn't
D needn't
A commented
B carried
C conducted
D filled
A research
B invention
C display
D occurrence
A the more crowded the beaches get
B the most crowded the beaches get
C the more the beaches get crowded
D the most the beaches get crowded
A old Japanese black
B Japanese old black
C black old Japanese
D old black Japanese
A an
B the
C Ø
D a
A worthy
B beneficial
C costly
D valuable
A decision
B decisive
C decide
D decisively
A catch on
B take over
C stand for
D hold on
A claim
B request
C demand
D requisite
A I'm going home
B I'm thirty years old
C Fine, thank you
D I'm leaving now
A It's very kind of you
B Congratulations!
C Better luck next time!
D It's my pleasure.
A understanding
B assistance
C confidence
D experience
A interesting
B hard
C easy
D simple
A outgoing
B mischievous
C shy
D caring
A given a lift
B deceived deliberately
C driven away
D treated with sincerity
A Traditions concerning children's lost teeth
B Animals eating children's lost teeth
C Customs concerning children's new teeth
D Presents for young children's lost teeth
A houses'
B countries'
C children's
D roofs'
A In Japan and Vietnam
B In Mongolia
C In Mexico and Spain
D In Korea
A they believe that this will make their child's new tooth good and strong
B they hope that their child will get some gifts for his or her tooth
C they think dogs like eating children's teeth
D they know that dogs are very responsible animals
A beginnings
B stories
C countries
D families
A Children give money to the Tooth Fairy.
B Children put their lost teeth under their pillows.
C Children hope to get money or gifts from the Tooth Fairy.
D Lost teeth are traditionally given to an angel or fairy.
A soon after midnight
B late in the morning
C long before bedtime
D early in the evening
A The importance of living organisms
B Measures to protect endangered species
C Causes of animal extinction
D Humans and endangered species
A unrecognizable
B unexpected
C unimportant
D unavoidable
A Animals will shift to another food chain in the community.
B The connections among the creatures in the food chain become closer.
C There might be a lack of food resources for some other species.
D Larger predators will look for other types of prey.
A natural obstacles
B low birthrates
C human-related effects
D some species
A a kind of harmless animals
B a kind of useful plants
C a harmful factor to the environment
D an achievement of human beings
A remain
B complete
C disappear
D develop
A The existence of humans is at the expense of some other species.
B Humans have difficult choices to make about saving endangered species.
C Some animals and plants cannot survive without human help.
D No other species can threaten the survival of humans on Earth.
A Animal and plant species which pose threats to humans will die out soon.
B Humans will make changes in their lifestyles to save other species.
C The dilemma humans face between maintaining their lives and saving other species remains.
D Saving popular animal and plant species should be given a high priority.
A Sally promised to go to work at the weekend.
B Sally apologized for not going to work at the weekend.
C Sally refused to go to work at the weekend.
D Sally regretted not going to work at the weekend.
A But for our seat belts, we would have survived that accident.
B If we weren't wearing our seat belts, we couldn't have survived that accident.
C Had we not been wearing our seat belts, we wouldn't have survived that accident.
D Without our seat belts, we could have survived that accident.
A I have met my grandparents for five years.
B I often met my grandparents five years ago.
C I didn't meet my grandparents five years ago.
D I last met my grandparents five years ago.
A ask
B when
C has
D homework
A to use
B punishment
C dealing with
D at school
A have
B that
C it
D wind
A My mother is too busy with her work at the office to take good care of us.
B My mother is so busy with her work at the office that she cannot take good care of us.
C Because my mother is very busy with her work at the office, she takes good care of us.
D In spite of being very busy with her work at the office, my mother takes good care of us.
A Some kinds of fish live in fresh water, or others live in sea water.
B Some kinds of fish live in fresh water, for others live in sea water.
C Some kinds of fish live in fresh water, so others live in sea water.
D Some kinds of fish live in fresh water, and others live in sea water.
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