A.footing
B. foot
C. feet
D. footer
A.footing
B. foot
C. feet
D. footer
When did the European traders make contact with China?
A.In the mid 17th century.
B.Around 1560.
C.As early as 1515.
D.In 1610.
When I entered the classroom, I found the students ______ the questions in groups.
A.to discuss
B.discuss
C.discussed
D.discussing
A.正确
B.错误
According to the passage, prediction markets can be more effective when ______.
A.firms can offer the most successful traders bigger prizes
B.the application of prediction results can be felt by employees
C.firms can keep the prediction as a novelty to staff
D.prediction is made by authoritative experts in certain field
When sometimes they cannot enjoy adequate sleep, the long sleepers might ().
A. appear disturbed
B. become energetic
C. feel dissatisfied
D. be extremely depressed
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